187-643: Nuclear proliferation is the spread of nuclear weapons , fissionable material, and weapons-applicable nuclear technology and information to nations not recognized as " Nuclear Weapon States " by the Treaty on the Non-Proliferation of Nuclear Weapons , commonly known as the Non-Proliferation Treaty or NPT . Proliferation has been opposed by many nations with and without nuclear weapons, as governments fear that more countries with nuclear weapons will increase
374-513: A misnomer , as their energy comes from the nucleus of the atom, just as it does with fusion weapons. In fission weapons, a mass of fissile material ( enriched uranium or plutonium ) is forced into supercriticality —allowing an exponential growth of nuclear chain reactions —either by shooting one piece of sub-critical material into another (the "gun" method) or by compression of a sub-critical sphere or cylinder of fissile material using chemically fueled explosive lenses . The latter approach,
561-591: A policy of deliberate ambiguity , it does not acknowledge having them. Germany , Italy , Turkey , Belgium , the Netherlands , and Belarus are nuclear weapons sharing states. South Africa is the only country to have independently developed and then renounced and dismantled its nuclear weapons. The Treaty on the Non-Proliferation of Nuclear Weapons aims to reduce the spread of nuclear weapons, but there are different views of its effectiveness. There are two basic types of nuclear weapons: those that derive
748-473: A German nuclear program. These efforts began immediately after the discovery of nuclear fission and its military potential. None of these efforts were explicitly public, because the weapon developments themselves were kept secret until the bombing of Hiroshima . Earnest international efforts to promote nuclear non-proliferation began soon after World War II , when the Truman Administration proposed
935-638: A candidate for Secretary-General or the admission of a member state, not in critical international security situations. In the negotiations leading up to the creation of the UN, the veto power was opposed by many small countries and was in fact forced on them by the veto nations—the United States, the United Kingdom, China, France, and the Soviet Union—by threatening that the UN would otherwise not be founded. Here
1122-597: A combination of fission and fusion reactions ( thermonuclear bomb ), producing a nuclear explosion . Both bomb types release large quantities of energy from relatively small amounts of matter . The first test of a fission ("atomic") bomb released an amount of energy approximately equal to 20,000 tons of TNT (84 TJ ). The first thermonuclear ("hydrogen") bomb test released energy approximately equal to 10 million tons of TNT (42 PJ). Nuclear bombs have had yields between 10 tons TNT (the W54 ) and 50 megatons for
1309-678: A conference—called for in the manifesto—in Pugwash, Nova Scotia , Eaton's birthplace. This conference was to be the first of the Pugwash Conferences on Science and World Affairs , held in July 1957. By the 1960s, steps were taken to limit both the proliferation of nuclear weapons to other countries and the environmental effects of nuclear testing . The Partial Nuclear Test Ban Treaty (1963) restricted all nuclear testing to underground nuclear testing , to prevent contamination from nuclear fallout, whereas
1496-458: A faster and less vulnerable attack, the development of long-range intercontinental ballistic missiles (ICBMs) and submarine-launched ballistic missiles (SLBMs) has given some nations the ability to plausibly deliver missiles anywhere on the globe with a high likelihood of success. More advanced systems, such as multiple independently targetable reentry vehicles (MIRVs), can launch multiple warheads at different targets from one missile, reducing
1683-594: A few nations possess such weapons or are suspected of seeking them. The only countries known to have detonated nuclear weapons—and acknowledge possessing them—are (chronologically by date of first test) the United States , the Soviet Union (succeeded as a nuclear power by Russia ), the United Kingdom , France , China , India , Pakistan , and North Korea . Israel is believed to possess nuclear weapons, though, in
1870-482: A fission bomb to initiate them. Such a device might provide a simpler path to thermonuclear weapons than one that required the development of fission weapons first, and pure fusion weapons would create significantly less nuclear fallout than other thermonuclear weapons because they would not disperse fission products. In 1998, the United States Department of Energy divulged that the United States had, "...made
2057-421: A fusion weapon as of January 2016 , though this claim is disputed. Thermonuclear weapons are considered much more difficult to successfully design and execute than primitive fission weapons. Almost all of the nuclear weapons deployed today use the thermonuclear design because it results in an explosion hundreds of times stronger than that of a fission bomb of similar weight. Thermonuclear bombs work by using
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#17330942790822244-479: A military defeat assisted this process. In North Korea, the activities concerned took place before the conclusion of its NPT safeguards agreement. With North Korea, the promised provision of commercial power reactors appeared to resolve the situation for a time, but it later withdrew from the NPT and declared it had nuclear weapons. In 1993 a program was initiated to strengthen and extend the classical safeguards system, and
2431-610: A model protocol was agreed by the IAEA Board of Governors 1997. The measures boosted the IAEA's ability to detect undeclared nuclear activities, including those with no connection to the civil fuel cycle. Innovations were of two kinds. Some could be implemented on the basis of IAEA's existing legal authority through safeguards agreements and inspections. Others required further legal authority to be conferred through an Additional Protocol . This must be agreed by each non-weapons state with IAEA, as
2618-472: A nation's economic electronics-based infrastructure. Because the effect is most effectively produced by high altitude nuclear detonations (by military weapons delivered by air, though ground bursts also produce EMP effects over a localized area), it can produce damage to electronics over a wide, even continental, geographical area. Research has been done into the possibility of pure fusion bombs : nuclear weapons that consist of fusion reactions without requiring
2805-532: A new nuclear strategy, one that is distinct from that which gave relative stability during the Cold War. Since 1996, the United States has had a policy of allowing the targeting of its nuclear weapons at terrorists armed with weapons of mass destruction . Robert Gallucci argues that although traditional deterrence is not an effective approach toward terrorist groups bent on causing a nuclear catastrophe, Gallucci believes that "the United States should instead consider
2992-408: A nuclear fuel. India has 14 small nuclear power reactors in commercial operation, two larger ones under construction, and ten more planned. The 14 operating ones (2548 MWe total) comprise: The two under construction and two of the planned ones are 450 MWe versions of these 200 MWe domestic products. Construction has been seriously delayed by financial and technical problems. In 2001 a final agreement
3179-524: A nuclear power program have a dual-use capability, in that several stages of the nuclear fuel cycle allow diversion of nuclear materials for nuclear weapons. When this happens a nuclear power program can become a route leading to the atomic bomb or a public annex to a secret bomb program. The crisis over Iran's nuclear activities is a case in point. Many UN and US agencies warn that building more nuclear reactors unavoidably increases nuclear proliferation risks. A fundamental goal for American and global security
3366-425: A nuclear war between two nations would result in mutual annihilation. From this point of view, the significance of nuclear weapons is to deter war because any nuclear war would escalate out of mutual distrust and fear, resulting in mutually assured destruction . This threat of national, if not global, destruction has been a strong motivation for anti-nuclear weapons activism. Critics from the peace movement and within
3553-411: A nuclear weapon from another country by threatening nuclear retaliation is known as the strategy of nuclear deterrence . The goal in deterrence is to always maintain a second strike capability (the ability of a country to respond to a nuclear attack with one of its own) and potentially to strive for first strike status (the ability to destroy an enemy's nuclear forces before they could retaliate). During
3740-465: A nuclear weapon is a gravity bomb dropped from aircraft ; this was the method used by the United States against Japan in 1945. This method places few restrictions on the size of the weapon. It does, however, limit attack range, response time to an impending attack, and the number of weapons that a country can field at the same time. With miniaturization, nuclear bombs can be delivered by both strategic bombers and tactical fighter-bombers . This method
3927-409: A nuclear weapon to its target is an important factor affecting both nuclear weapon design and nuclear strategy . The design, development, and maintenance of delivery systems are among the most expensive parts of a nuclear weapons program; they account, for example, for 57% of the financial resources spent by the United States on nuclear weapons projects since 1940. The simplest method for delivering
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#17330942790824114-433: A nuclear weapon with suitable materials (such as cobalt or gold ) creates a weapon known as a salted bomb . This device can produce exceptionally large quantities of long-lived radioactive contamination . It has been conjectured that such a device could serve as a "doomsday weapon" because such a large quantity of radioactivities with half-lives of decades, lifted into the stratosphere where winds would distribute it around
4301-400: A party to the NPT, although North Korea acceded to the NPT in 1985, then withdrew in 2003 and conducted its first nuclear test in 2006. One critique of the NPT is that the treaty is discriminatory in the sense that only those countries that tested nuclear weapons before 1968 are recognized as nuclear weapon states while all other states are treated as non-nuclear-weapon states who can only join
4488-421: A policy of expanded deterrence, which focuses not solely on the would-be nuclear terrorists but on those states that may deliberately transfer or inadvertently leak nuclear weapons and materials to them. By threatening retaliation against those states, the United States may be able to deter that which it cannot physically prevent.". Graham Allison makes a similar case, arguing that the key to expanded deterrence
4675-423: A result, the delegations can negotiate with each other in secret, striking deals and compromises without having their every word transcribed into the permanent record. The privacy of the conference room also makes it possible for the delegates to deal with each other in a friendly manner. In one early consultation, a new delegate from a Communist nation began a propaganda attack on the United States, only to be told by
4862-545: A safeguards system as specified under Article III of the Nuclear Non-Proliferation Treaty (NPT) of 1968, which aims to ensure that civil stocks of uranium and plutonium, as well as facilities and technologies associated with these nuclear materials, are used only for peaceful purposes and do not contribute in any way to proliferation or nuclear weapons programs. It is often argued that the proliferation of nuclear weapons to many other states has been prevented by
5049-559: A second series of nuclear tests in 1998, Pakistan followed with a series of tests of its own. In 2006, North Korea conducted its first nuclear test . Early efforts to prevent nuclear proliferation involved intense government secrecy, the wartime acquisition of known uranium stores (the Combined Development Trust ), and at times even outright sabotage —such as the bombing of a heavy-water facility in Norway thought to be used for
5236-531: A set of export rules, to the IAEA in 1978. These were to ensure that transfers of nuclear material or equipment would not be diverted to unsafeguarded nuclear fuel cycle or nuclear explosive activities, and formal government assurances to this effect were required from recipients. The Guidelines also recognised the need for physical protection measures in the transfer of sensitive facilities, technology and weapons-usable materials, and strengthened retransfer provisions. The group began with seven members—the United States,
5423-447: A significant portion of their energy from fission reactions used to "trigger" fusion reactions, and fusion reactions can themselves trigger additional fission reactions. Only six countries—the United States , Russia , the United Kingdom , China , France , and India —have conducted thermonuclear weapon tests. Whether India has detonated a "true" multi-staged thermonuclear weapon is controversial. North Korea claims to have tested
5610-509: A standoff between Cuba and Colombia only ended after three months and a record 154 rounds of voting; both eventually withdrew in favour of Mexico as a compromise candidate. A retiring member is not eligible for immediate re-election. The African Group is represented by three members; the Latin America and the Caribbean , Asia-Pacific, and Western European and Others groups by two apiece; and
5797-547: A substantial investment" in the past to develop pure fusion weapons, but that, "The U.S. does not have and is not developing a pure fusion weapon", and that, "No credible design for a pure fusion weapon resulted from the DOE investment". Nuclear isomers provide a possible pathway to fissionless fusion bombs. These are naturally occurring isotopes ( Hf being a prominent example) which exist in an elevated energy state. Mechanisms to release this energy as bursts of gamma radiation (as in
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5984-741: A supplement to any existing comprehensive safeguards agreement. Weapons states have agreed to accept the principles of the model additional protocol. Key elements of the model Additional Protocol: As of 3 July 2015, 146 countries have signed the Additional Protocols and 126 have brought them into force. The IAEA is also applying the measures of the Additional Protocol in Taiwan. Under the Joint Comprehensive Plan of Action , Iran has agreed to implement its protocol provisionally. Among
6171-839: A whole received the Nobel Peace Prize in 1988. As of 28 February 2023, the UN had 86,903 uniformed and civilian personnel serving in 12 peacekeeping missions, with 121 countries contributing military personnel. The largest was the United Nations Organization Stabilization Mission in the Democratic Republic of the Congo ( MONUSCO ), which included 20,688 uniformed personnel. The smallest, United Nations Military Observer Group in India and Pakistan ( UNMOGIP ), included 42 uniformed personnel responsible for monitoring
6358-607: Is a description of the situation by Francis O. Wilcox, an adviser to the US delegation to the 1945 conference: At San Francisco, the issue was made crystal clear by the leaders of the Big Five: it was either the Charter with the veto or no Charter at all. Senator Connally [from the U.S. delegation] dramatically tore up a copy of the Charter during one of his speeches and reminded the small states that they would be guilty of that same act if they opposed
6545-482: Is a potential nuclear arms stockpile replacement since the isotope naturally decays . In May 1995, NPT parties reaffirmed their commitment to a Fissile Materials Cut-off Treaty to prohibit the production of any further fissile material for weapons. This aims to complement the Comprehensive Nuclear-Test-Ban Treaty of 1996 (not entered into force as of June 2020) and to codify commitments made by
6732-453: Is a prime cause of bilateral tension, its sovereignty being in dispute since 1948 . There is a persistent low-level bilateral military conflict due to the alleged backing of insurgency by Pakistan in India, and the infiltration of Pakistani state-backed militants into the Indian state of Jammu and Kashmir , along with the disputed status of Kashmir . Both engaged in a conventional arms race in
6919-420: Is a thermonuclear weapon that yields a relatively small explosion but a relatively large amount of neutron radiation . Such a weapon could, according to tacticians, be used to cause massive biological casualties while leaving inanimate infrastructure mostly intact and creating minimal fallout. Because high energy neutrons are capable of penetrating dense matter, such as tank armor, neutron warheads were procured in
7106-451: Is analogous to identifying a criminal by fingerprints. "The goal would be twofold: first, to deter leaders of nuclear states from selling weapons to terrorists by holding them accountable for any use of their weapons; second, to give leaders every incentive to tightly secure their nuclear weapons and materials." According to the Pentagon's June 2019 " Doctrine for Joint Nuclear Operations " of
7293-450: Is authorized to issue both Presidential Statements (subject to consensus amongst Council members) and notes, which are used to make declarations of intent that the full Security Council can then pursue. The presidency of the council is held by each of the members in turn for one month, following the English alphabetical order of the member states' names. The list of nations that will hold
7480-403: Is coming up with ways of tracing nuclear material to the country that forged the fissile material. "After a nuclear bomb detonates, nuclear forensics cops would collect debris samples and send them to a laboratory for radiological analysis. By identifying unique attributes of the fissile material, including its impurities and contaminants, one could trace the path back to its origin." The process
7667-590: Is elected for this term. Terms beginning in odd-numbered years consist of two Western European and Other members, and one each from Asia-Pacific, Africa, and Latin America and the Caribbean. During the 2016 United Nations Security Council election , neither Italy nor the Netherlands met the required two-thirds majority for election. They subsequently agreed to split the term of the Western European and Others Group. It
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7854-481: Is for the purpose of achieving different yields for different situations , and in manipulating design elements to attempt to minimize weapon size, radiation hardness or requirements for special materials, especially fissile fuel or tritium. Some nuclear weapons are designed for special purposes; most of these are for non-strategic (decisively war-winning) purposes and are referred to as tactical nuclear weapons . The neutron bomb purportedly conceived by Sam Cohen
8041-551: Is no evidence that it is feasible beyond the military domain. However, the US Air Force funded studies of the physics of antimatter in the Cold War , and began considering its possible use in weapons, not just as a trigger, but as the explosive itself. A fourth generation nuclear weapon design is related to, and relies upon, the same principle as antimatter-catalyzed nuclear pulse propulsion . Most variation in nuclear weapon design
8228-409: Is not a fusion bomb. In the boosted bomb, the neutrons produced by the fusion reactions serve primarily to increase the efficiency of the fission bomb. There are two types of boosted fission bomb: internally boosted, in which a deuterium-tritium mixture is injected into the bomb core, and externally boosted, in which concentric shells of lithium-deuteride and depleted uranium are layered on the outside of
8415-430: Is not accurate. Both Canada (by supplying the 40 MW research reactor) and the United States (by supplying 21 tons of heavy water) supplied India with the technology necessary to create a nuclear weapons program, dubbed CIRUS (Canada-India Reactor, United States). Canada sold India the reactor on the condition that the reactor and any by-products would be "employed for peaceful purposes only." Archived 27 September 2007 at
8602-427: Is not classified as a "special nuclear material" but rather as a by-product. It is seen as an important litmus test on the seriousness of the United States' intention to nuclear disarm . This radioactive, super-heavy, hydrogen isotope is used to boost the efficiency of fissile materials in nuclear weapons. The United States resumed tritium production in 2003 for the first time in 15 years. This could indicate that there
8789-490: Is not clear that this has ever been implemented, and their plausible use in nuclear weapons is a matter of dispute. The other basic type of nuclear weapon produces a large proportion of its energy in nuclear fusion reactions. Such fusion weapons are generally referred to as thermonuclear weapons or more colloquially as hydrogen bombs (abbreviated as H-bombs ), as they rely on fusion reactions between isotopes of hydrogen ( deuterium and tritium ). All such weapons derive
8976-438: Is the growth and modernization of China's nuclear arsenal and its assistance with Pakistan's nuclear power programme and, reportedly, with missile technology, which exacerbate Indian concerns. In particular, as viewed by Indian strategists, Pakistan is aided by China's People's Liberation Army . Nuclear power for civil use is well established in India . Its civil nuclear strategy has been directed towards complete independence in
9163-448: Is the primary means of nuclear weapons delivery; the majority of US nuclear warheads, for example, are free-fall gravity bombs, namely the B61 , which is being improved upon to this day. Preferable from a strategic point of view is a nuclear weapon mounted on a missile , which can use a ballistic trajectory to deliver the warhead over the horizon. Although even short-range missiles allow for
9350-585: Is to minimize the proliferation risks associated with the expansion of nuclear power. If this development is "poorly managed or efforts to contain risks are unsuccessful, the nuclear future will be dangerous". For nuclear power programs to be developed and managed safely and securely, it is important that countries have domestic “ good governance ” characteristics that will encourage proper nuclear operations and management: These characteristics include low degrees of corruption (to avoid officials selling materials and technology for their own personal gain as occurred with
9537-555: The A.Q. Khan smuggling network in Pakistan), high degrees of political stability (defined by the World Bank as "likelihood that the government will be destabilized or overthrown by unconstitutional or violent means, including politically-motivated violence and terrorism"), high governmental effectiveness scores (a World Bank aggregate measure of "the quality of the civil service and the degree of its independence from political pressures [and]
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#17330942790829724-657: The Baruch Plan of 1946, named after Bernard Baruch , America's first representative to the United Nations Atomic Energy Commission (UNAEC). The Baruch Plan , which drew heavily from the Acheson–Lilienthal Report of 1946, proposed the verifiable dismantlement and destruction of the U.S. nuclear arsenal (which, at that time, was the only nuclear arsenal in the world) after all governments had cooperated successfully to accomplish two things: (1)
9911-473: The Democratic Republic of the Congo . The Security Council consists of fifteen members , of which five are permanent : China , France , Russia , the United Kingdom , and the United States . These were the great powers that were the victors of World War II (or their recognized successor states). Permanent members can veto (block) any substantive Security Council resolution, including those on
10098-928: The Dumbarton Oaks Conference in Washington, D.C. to negotiate the UN's structure, and the composition of the UN Security Council quickly became the dominant issue. France, the Republic of China, the Soviet Union, the UK and US were selected as permanent members of the Security Council; the US attempted to add Brazil as a sixth member but was opposed by the heads of the Soviet and British delegations. The most contentious issue at Dumbarton and in successive talks proved to be
10285-700: The Eastern European Group by one. Traditionally, one of the seats assigned to either the Asia-Pacific Group or the African Group is filled by a nation from the Arab world , alternating between the groups. Currently, elections for terms beginning in even-numbered years select two African members, and one each within Eastern Europe, Asia-Pacific, and Latin America and the Caribbean; the traditional "Arab seat"
10472-651: The Eighteen Nation Disarmament Committee (ENDC) finished negotiations on the text of the NPT. In June 1968, the U.N. General Assembly endorsed the NPT with General Assembly Resolution 2373 (XXII), and in July 1968, the NPT opened for signature in Washington, D.C. , London and Moscow . The NPT entered into force in March 1970. Since the mid-1970s, the primary focus of non-proliferation efforts has been to maintain, and even increase, international control over
10659-487: The European Commission . Its goal is to "[..] provide competitive, commercially-based services as an alternative to a state’s development of costly, proliferation-sensitive facilities, and address other issues associated with the safe and secure management of used fuel and radioactive waste ." According to Kenneth D. Bergeron's Tritium on Ice: The Dangerous New Alliance of Nuclear Weapons and Nuclear Power , tritium
10846-635: The Hague Conventions of 1899 and 1907 . Following the catastrophic loss of life in World War I , the Paris Peace Conference established the League of Nations to maintain harmony between the nations. This organization successfully resolved some territorial disputes and created international structures for areas such as postal mail, aviation, and opium control, some of which would later be absorbed into
11033-658: The Korean War and the Congo Crisis and peacekeeping missions in Cyprus , West New Guinea , and the Sinai Peninsula . With the collapse of the Soviet Union , UN peacekeeping efforts increased dramatically in scale, with the Security Council authorizing major military and peacekeeping missions in Kuwait , Namibia , Cambodia , Bosnia and Herzegovina , Rwanda , Somalia , Sudan , and
11220-512: The Nuclear Non-Proliferation Treaty (NPT), though there are other states known or believed to be in possession of nuclear weapons. The block of Western democratic and generally aligned permanent members (France, the UK and the US) is styled as the "P3". Under Article 27 of the UN Charter, Security Council decisions on all substantive matters require the affirmative votes of nine (i.e. three-fifths) of
11407-516: The People's Republic of China , an acknowledged nuclear weapons state. Both countries are opposed to the NPT as it stands, and India has consistently attacked the Treaty since its inception in 1970 labeling it as a lopsided treaty in favor of the nuclear powers. Relations between the two countries are tense and hostile, and the risks of nuclear conflict between them have long been considered quite high. Kashmir
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#173309427908211594-668: The Salvadoran Civil War , launched a successful peacekeeping mission in Namibia , and oversaw democratic elections in post- apartheid South Africa and post- Khmer Rouge Cambodia. In 1991, the Security Council demonstrated its renewed vigor by condemning the Iraqi invasion of Kuwait on the same day of the attack and later authorizing a US-led coalition that successfully repulsed the Iraqis. Undersecretary-General Brian Urquhart later described
11781-688: The Starfish Prime high-altitude nuclear test in 1962, an unexpected effect was produced which is called a nuclear electromagnetic pulse . This is an intense flash of electromagnetic energy produced by a rain of high-energy electrons which in turn are produced by a nuclear bomb's gamma rays. This flash of energy can permanently destroy or disrupt electronic equipment if insufficiently shielded. It has been proposed to use this effect to disable an enemy's military and civilian infrastructure as an adjunct to other nuclear or conventional military operations. By itself it could as well be useful to terrorists for crippling
11968-417: The Treaty on the Non-Proliferation of Nuclear Weapons (1968) attempted to place restrictions on the types of activities signatories could participate in, with the goal of allowing the transference of non-military nuclear technology to member countries without fear of proliferation. United Nations Security Council The United Nations Security Council ( UNSC ) is one of the six principal organs of
12155-548: The Tsar Bomba (see TNT equivalent ). A thermonuclear weapon weighing as little as 600 pounds (270 kg) can release energy equal to more than 1.2 megatonnes of TNT (5.0 PJ). A nuclear device no larger than a conventional bomb can devastate an entire city by blast, fire, and radiation . Since they are weapons of mass destruction , the proliferation of nuclear weapons is a focus of international relations policy. Nuclear weapons have been deployed twice in war , both by
12342-663: The Tsar Bomba of the USSR, which released an energy equivalent of over 50 megatons of TNT (210 PJ), was a three-stage weapon. Most thermonuclear weapons are considerably smaller than this, due to practical constraints from missile warhead space and weight requirements. In the early 1950s the Livermore Laboratory in the United States had plans for the testing of two massive bombs, Gnomon and Sundial , 1 gigaton of TNT and 10 gigatons of TNT respectively. Fusion reactions do not create fission products, and thus contribute far less to
12529-488: The U.N. General Assembly . Eisenhower's proposal led eventually to the creation of the International Atomic Energy Agency (IAEA) in 1957. Under the "Atoms for Peace" program thousands of scientists from around the world were educated in nuclear science and then dispatched home, where many later pursued secret weapons programs in their home country. Efforts to conclude an international agreement to limit
12716-504: The UK , and the United States . Notable non-signatories to the NPT are Israel, Pakistan, and India (the latter two have since tested nuclear weapons, while Israel is considered by most to be an unacknowledged nuclear weapons state). North Korea was once a signatory but withdrew in January 2003. The legality of North Korea's withdrawal is debatable but as of 9 October 2006, North Korea clearly possesses
12903-630: The United Nations (UN) and is charged with ensuring international peace and security , recommending the admission of new UN members to the General Assembly , and approving any changes to the UN Charter . Its powers as outlined in the United Nations Charter include establishing peacekeeping operations, enacting international sanctions , and authorizing military action . The UNSC is
13090-527: The Wayback Machine . Similarly, the United States sold India heavy water for use in the reactor "only... in connection with research into and the use of atomic energy for peaceful purposes" Archived 27 September 2007 at the Wayback Machine . India, in violation of these agreements, used the Canadian-supplied reactor and American-supplied heavy water to produce plutonium for their first nuclear explosion, Smiling Buddha . The Indian government controversially justified this, however, by claiming that Smiling Buddha
13277-491: The fissile material and specialized technologies necessary to build such devices because these are the most difficult and expensive parts of a nuclear weapons program. The main materials whose generation and distribution are controlled are highly enriched uranium and plutonium . Other than the acquisition of these special materials, the scientific and technical means for weapons construction to develop rudimentary, but working, nuclear explosive devices are considered to be within
13464-424: The hafnium controversy ) have been proposed as possible triggers for conventional thermonuclear reactions. Antimatter , which consists of particles resembling ordinary matter particles in most of their properties but having opposite electric charge , has been considered as a trigger mechanism for nuclear weapons. A major obstacle is the difficulty of producing antimatter in large enough quantities, and there
13651-544: The head of government or head of state . Despite controls and regulations governing nuclear weapons, there is an inherent danger of "accidents, mistakes, false alarms, blackmail, theft, and sabotage". In the late 1940s, lack of mutual trust prevented the United States and the Soviet Union from making progress on arms control agreements. The Russell–Einstein Manifesto was issued in London on July 9, 1955, by Bertrand Russell in
13838-516: The island of Taiwan in 1949, during the Chinese Civil War . The Chinese Communist Party assumed control of mainland China , thenceforth known as the People's Republic of China. In 1971, General Assembly Resolution 2758 recognized the People's Republic as the rightful representative of China in the UN and gave it the seat on the Security Council that had been held by the Republic of China, which
14025-429: The southern part of the country . At the moment, India has a small fast breeder reactor and is planning a much larger one ( Prototype Fast Breeder Reactor ). This self-sufficiency extends from uranium exploration and mining through fuel fabrication, heavy water production, reactor design and construction, to reprocessing and waste management. It is also developing technology to utilise its abundant resources of thorium as
14212-436: The tropopause into the stratosphere , where the calm non-turbulent winds permit the debris to travel great distances from the burst, eventually settling and unpredictably contaminating areas far removed from the target of the explosion. There are other types of nuclear weapons as well. For example, a boosted fission weapon is a fission bomb that increases its explosive yield through a small number of fusion reactions, but it
14399-537: The "implosion" method, is more sophisticated and more efficient (smaller, less massive, and requiring less of the expensive fissile fuel) than the former. A major challenge in all nuclear weapon designs is to ensure that a significant fraction of the fuel is consumed before the weapon destroys itself. The amount of energy released by fission bombs can range from the equivalent of just under a ton to upwards of 500,000 tons (500 kilotons ) of TNT (4.2 to 2.1 × 10 GJ). All fission reactions generate fission products ,
14586-451: The 1970s, the UN budget for social and economic development was far greater than its budget for peacekeeping. After the Cold War, the UN saw a radical expansion in its peacekeeping duties, taking on more missions in ten years than it had in the previous four decades. Between 1988 and 2000, the number of adopted Security Council resolutions more than doubled, and the peacekeeping budget increased more than tenfold. The UN negotiated an end to
14773-578: The 1980s (though not deployed in Europe) for use as tactical payloads for US Army artillery shells (200 mm W79 and 155 mm W82 ) and short range missile forces. Soviet authorities announced similar intentions for neutron warhead deployment in Europe; indeed, they claimed to have originally invented the neutron bomb, but their deployment on USSR tactical nuclear forces is unverifiable. A type of nuclear explosive most suitable for use by ground special forces
14960-410: The 1980s, including sophisticated technology and equipment capable of delivering nuclear weapons. In the 1990s the arms race quickened. In 1994 India reversed a four-year trend of reduced allocations for defence, and despite its much smaller economy, Pakistan was expected to push its own expenditures yet higher. Both have lost their patrons: India, the former USSR, and Pakistan, the United States. But it
15147-425: The Cold War, policy and military theorists considered the sorts of policies that might prevent a nuclear attack, and they developed game theory models that could lead to stable deterrence conditions. Different forms of nuclear weapons delivery (see above) allow for different types of nuclear strategies. The goals of any strategy are generally to make it difficult for an enemy to launch a pre-emptive strike against
15334-605: The Congo (UNOC), the largest military force of its early decades, to restore order to the breakaway State of Katanga , restoring it to the control of the Democratic Republic of the Congo by 1964. However, the Security Council found itself bypassed in favour of direct negotiations between the superpowers in some of the decade's larger conflicts, such as the Cuban Missile Crisis or the Vietnam War . Focusing instead on smaller conflicts without an immediate Cold War connection,
15521-544: The IAEA reports to both the United Nations General Assembly and the Security Council . The IAEA regularly inspects civil nuclear facilities to verify the accuracy of documentation supplied to it. The agency checks inventories, and samples and analyzes materials. Safeguards are designed to deter a diversion of nuclear material by increasing the risk of early detection. They are complemented by controls on
15708-722: The ICC to investigate the Libyan government's violent response to the Libyan Civil War . Security Council Resolution 1674 , adopted on 28 April 2006, "reaffirms the provisions of paragraphs 138 and 139 of the 2005 World Summit Outcome Document regarding the responsibility to protect populations from genocide, war crimes, ethnic cleansing and crimes against humanity". The Security Council reaffirmed this responsibility to protect in Resolution 1706 on 31 August of that year. These resolutions commit
15895-794: The International Criminal Court recognizes that the Security Council has authority to refer cases to the Court in which the Court could not otherwise exercise jurisdiction. The Council exercised this power for the first time in March 2005, when it referred to the Court "the situation prevailing in Darfur since 1 July 2002"; since Sudan is not a party to the Rome Statute, the Court could not otherwise have exercised jurisdiction. The Security Council made its second such referral in February 2011 when it asked
16082-488: The Joint Chiefs of Staffs website Publication, "Integration of nuclear weapons employment with conventional and special operations forces is essential to the success of any mission or operation." Because they are weapons of mass destruction, the proliferation and possible use of nuclear weapons are important issues in international relations and diplomacy. In most countries, the use of nuclear force can only be authorized by
16269-565: The NPT and which have significant unsafeguarded nuclear activities; India, Pakistan, and Israel fall within this category. While safeguards apply to some of their activities, others remain beyond scrutiny. A further concern is that countries may develop various sensitive nuclear fuel cycle facilities and research reactors under full safeguards and then subsequently opt out of the NPT. Bilateral agreements, such as insisted upon by Australia and Canada for sale of uranium , address this by including fallback provisions, but many countries are outside
16456-452: The NPT regime lay in the fact that no obvious diversion of material was involved. The uranium used as fuel probably came from indigenous sources, and the nuclear facilities were built by the countries themselves without being declared or placed under safeguards. Iraq, as an NPT party, was obliged to declare all facilities but did not do so. Nevertheless, the activities were detected and brought under control using international diplomacy. In Iraq,
16643-406: The NPT, and a 100 MW indigenous unit in operation since 1985. Both use local uranium, as India does not import any nuclear fuel. It is estimated that India may have built up enough weapons-grade plutonium for a hundred nuclear warheads. It is widely believed that the nuclear programs of India and Pakistan used Canadian CANDU reactors to produce fissionable materials for their weapons; however, this
16830-497: The Nuclear Age (1961) that mere possession of a nuclear arsenal was enough to ensure deterrence, and thus concluded that the spread of nuclear weapons could increase international stability . Some prominent neo-realist scholars, such as Kenneth Waltz and John Mearsheimer , have argued, along the lines of Gallois, that some forms of nuclear proliferation would decrease the likelihood of total war , especially in troubled regions of
17017-646: The Presidency in 2024 is as follows: Unlike the General Assembly, the Security Council is not bound to sessions . Each Security Council member must have a representative available at UN Headquarters at all times in case an emergency meeting becomes necessary. The Security Council generally meets in a designated chamber in the United Nations Conference Building in New York City. The chamber
17204-531: The Security Council "may investigate any dispute, or any situation which might lead to international friction or give rise to a dispute". The Council may "recommend appropriate procedures or methods of adjustment" if it determines that the situation might endanger international peace and security. These recommendations are generally considered to not be binding, as they lack an enforcement mechanism. A minority of scholars, such as Stephen Zunes , have argued that resolutions made under Chapter VI are "still directives by
17391-423: The Security Council and differ only in that they do not have the same stringent enforcement options, such as the use of military force". Under Chapter VII , the council has broader power to decide what measures are to be taken in situations involving "threats to the peace, breaches of the peace, or acts of aggression." In such situations, the council is not limited to recommendations but may take action, including
17578-624: The Security Council are signatory to the NPT, and all permanent members are nuclear weapons states . The UN's role in international collective security is defined by the UN Charter, which authorizes the Security Council to investigate any situation threatening international peace; recommend procedures for peaceful resolution of a dispute; call upon other member nations to completely or partially interrupt economic relations as well as sea, air, postal and radio communications, or to sever diplomatic relations; and enforce its decisions militarily, or by any means necessary. The Security Council also recommends
17765-738: The Security Council deployed the United Nations Temporary Executive Authority in West New Guinea in 1962 and the United Nations Peacekeeping Force in Cyprus in 1964, the latter of which would become one of the UN's longest-running peacekeeping missions. On 25 October 1971, over US opposition, but with the support of many Third World nations, along with the Socialist People's Republic of Albania ,
17952-511: The Security Council held 160 consultations, 16 private meetings and 9 public meetings. In times of crisis, the Security Council still meets primarily in consultations, but it also holds more public meetings. After the outbreak of the Russo-Ukrainian War in 2014, the Security Council returned to the patterns of the Cold War, as Russia and the Western countries engaged in verbal duels in front of
18139-576: The Security Council met for the first time at Church House, Westminster , in London, United Kingdom. Subsequently, during the 1946–1951 period it conducted sessions at the United Nation's interim headquarters in Lake Success, New York , which were televised live on CBS by the journalist Edmund Chester in 1949. The Security Council was largely paralyzed in its early decades by the Cold War in between
18326-533: The Security Council moved into a temporary facility in the General Assembly Building as its chamber underwent renovations as part of the UN Capital Master Plan. The renovations were funded by Norway, the chamber's original donor, for a total cost of US$ 5 million. The chamber reopened on 16 April 2013. The representatives of the member states are seated on a horseshoe-shaped table, with
18513-406: The Security Council to protect civilians in an armed conflict, including taking action against genocide, war crimes, ethnic cleansing and crimes against humanity. The Security Council's five permanent members, below, have the power to veto any substantive resolution; this allows a permanent member to block adoption of a resolution, but not to prevent or end debate. At the UN's founding in 1945,
18700-410: The Soviet delegate, "We don't talk that way in here." A permanent member can cast a "pocket veto" during the informal consultation by declaring its opposition to a measure. Since a veto would prevent the resolution from being passed, the sponsor will usually refrain from putting the resolution to a vote. Resolutions are vetoed only if the sponsor feels so strongly about a measure that it wishes to force
18887-700: The UN. However, the League lacked representation for colonial peoples (then half the world's population) and significant participation from several major powers, including the US, the USSR , Germany, and Japan; it failed to act against the 1931 Japanese invasion of Manchuria , the Second Italo-Ethiopian War in 1935, the 1937 Japanese occupation of China , and Nazi expansions under Adolf Hitler that escalated into World War II . On New Year's Day 1942, President Roosevelt, Prime Minister Churchill , Maxim Litvinov of
19074-587: The US and USSR and their allies and the Council generally was only able to intervene in unrelated conflicts. (A notable exception was the 1950 Security Council resolution authorizing a US-led coalition to repel the North Korean invasion of South Korea , passed in the absence of the USSR .) In 1956, the first UN peacekeeping force was established to end the Suez Crisis ; however, the UN was unable to intervene against
19261-457: The US using the veto to block the re-election of Boutros Boutros-Ghali in 1996. Along with the five permanent members, the Security Council of the United Nations has temporary members that hold their seats on a rotating basis by geographic region. Non-permanent members may be involved in global security briefings. In its first two decades, the Security Council had six non-permanent members,
19448-651: The USAAF detonated a plutonium implosion-type fission bomb nicknamed " Fat Man " over the Japanese city of Nagasaki . These bombings caused injuries that resulted in the deaths of approximately 200,000 civilians and military personnel . The ethics of these bombings and their role in Japan's surrender are to this day, still subjects of debate . Since the atomic bombings of Hiroshima and Nagasaki , nuclear weapons have been detonated over 2,000 times for testing and demonstration. Only
19635-753: The USAF AIR-2 Genie , the AIM-26 Falcon and US Army Nike Hercules . Missile interceptors such as the Sprint and the Spartan also used small nuclear warheads (optimized to produce neutron or X-ray flux) but were for use against enemy strategic warheads. Other small, or tactical, nuclear weapons were deployed by naval forces for use primarily as antisubmarine weapons. These included nuclear depth bombs or nuclear armed torpedoes. Nuclear mines for use on land or at sea are also possibilities. The system used to deliver
19822-496: The USSR's simultaneous invasion of Hungary following that country's revolution . Cold War divisions also paralysed the Security Council's Military Staff Committee , which had been formed by Articles 45–47 of the UN Charter to oversee UN forces and create UN military bases. The committee continued to exist on paper but largely abandoned its work in the mid-1950s. In 1960, the UN deployed the United Nations Operation in
20009-754: The USSR, and T. V. Soong of the Republic of China , signed a short document, based on the Atlantic Charter and the London Declaration , which later came to be known as the United Nations Declaration . The next day the representatives of 22 other nations added their signatures. The term "United Nations" was first officially used when 26 governments had signed the Declaration. By 1 March 1945, 21 additional states had signed. The term " Four Powers "
20196-515: The United States against the Japanese cities of Hiroshima and Nagasaki in 1945 during World War II . Nuclear weapons have only twice been used in warfare, both times by the United States against Japan at the end of World War II . On August 6, 1945, the United States Army Air Forces (USAAF) detonated a uranium gun-type fission bomb nicknamed " Little Boy " over the Japanese city of Hiroshima ; three days later, on August 9,
20383-498: The United States 89. Roughly two-thirds of Soviet and Russian combined vetoes were in the first ten years of the Security Council's existence. Between 1996 and 2012, the United States vetoed 13 resolutions, Russia 7, and China 5, whilst France and the United Kingdom did not use the veto. An early veto by Soviet Commissar Andrei Vishinsky blocked a resolution on the withdrawal of French forces from Syria and Lebanon which were under French mandate in February 1946; this veto established
20570-401: The United States, the UK, France and Russia to cease production of weapons material, as well as putting a similar ban on China. This treaty will also put more pressure on Israel, India and Pakistan to agree to international verification. On 9 August 2005, Ayatollah Ali Khamenei issued a fatwa forbidding the production, stockpiling and use of nuclear weapons . Khamenei's official statement
20757-512: The United States. Small, two-man portable tactical weapons (somewhat misleadingly referred to as suitcase bombs ), such as the Special Atomic Demolition Munition , have been developed, although the difficulty of combining sufficient yield with portability limits their military utility. Nuclear warfare strategy is a set of policies that deal with preventing or fighting a nuclear war. The policy of trying to prevent an attack by
20944-530: The admission of new member states to the United Nations or nominees for the office of Secretary-General . This veto right does not carry over into General Assembly matters or votes, which are non-binding. The other ten members are elected on a regional basis for a term of two years. The body's presidency rotates monthly amongst its members. Resolutions of the Security Council are typically enforced by UN peacekeepers , which consist of military forces voluntarily provided by member states and funded independently of
21131-406: The capability to make a nuclear explosive device. The IAEA was established on 29 July 1957 to help nations develop nuclear energy for peaceful purposes. Allied to this role is the administration of safeguards arrangements to provide assurance to the international community that individual countries are honoring their commitments under the treaty. Though established under its own international treaty,
21318-595: The ceasefire in Jammu and Kashmir . Peacekeepers with the United Nations Truce Supervision Organization (UNTSO) have been stationed in the Middle East since 1948, the longest-running active peacekeeping mission. UN peacekeepers have also drawn criticism in several postings. Peacekeepers have been accused of child rape, soliciting prostitutes, or sexual abuse during various peacekeeping missions in
21505-489: The chamber to voice their positions in different ways, such as with walkouts . Due to the public scrutiny of the Security Council Chamber, much of the work of the Security Council is conducted behind closed doors in "informal consultations". In 1978, West Germany funded the construction of a conference room next to the Security Council Chamber. The room was used for "informal consultations", which soon became
21692-485: The chance of a successful missile defense . Today, missiles are most common among systems designed for delivery of nuclear weapons. Making a warhead small enough to fit onto a missile, though, can be difficult. Tactical weapons have involved the most variety of delivery types, including not only gravity bombs and missiles but also artillery shells, land mines , and nuclear depth charges and torpedoes for anti-submarine warfare . An atomic mortar has been tested by
21879-464: The correctness of formal declarations by suspect states, in the 1990s attention turned to what might not have been declared. While accepting safeguards at declared facilities, Iraq had set up elaborate equipment elsewhere in an attempt to enrich uranium to weapons-grade. North Korea attempted to use research reactors (not commercial electricity-generating reactors) and a nuclear reprocessing plant to produce some weapons-grade plutonium . The weakness of
22066-662: The council, but not procedural resolutions, meaning that the permanent members could not prevent debate on a resolution. On 25 April 1945, the UN Conference on International Organization began in San Francisco, attended by fifty governments and a number of non-governmental organizations involved in drafting the United Nations Charter . At the conference, H. V. Evatt of the Australian delegation pushed to further restrict
22253-466: The council. After approval by the Security Council, the UN may send peacekeepers to regions where armed conflict has recently ceased or paused to enforce the terms of peace agreements and to discourage combatants from resuming hostilities. Since the UN does not maintain its own military, peacekeeping forces are voluntarily provided by member states. These soldiers are sometimes nicknamed "Blue Helmets" for their distinctive gear. The peacekeeping force as
22440-435: The creation of nuclear fallout than fission reactions, but because all thermonuclear weapons contain at least one fission stage, and many high-yield thermonuclear devices have a final fission stage, thermonuclear weapons can generate at least as much nuclear fallout as fission-only weapons. Furthermore, high yield thermonuclear explosions (most dangerously ground bursts) have the force to lift radioactive debris upwards past
22627-450: The decision process. The prospect of mutually assured destruction might not deter an enemy who expects to die in the confrontation. Further, if the initial act is from a stateless terrorist instead of a sovereign nation, there might not be a nation or specific target to retaliate against. It has been argued, especially after the September 11, 2001, attacks , that this complication calls for
22814-413: The destruction of nuclear weapons invoked basic moral and religious intuitions. In one part of his address to the UN, Baruch said, "Behind the black portent of the new atomic age lies a hope which, seized upon with faith, can work out our salvation. If we fail, then we have damned every man to be the slave of Fear. Let us not deceive ourselves. We must elect World Peace or World Destruction.... We must answer
23001-463: The energy of a fission bomb to compress and heat fusion fuel. In the Teller-Ulam design , which accounts for all multi-megaton yield hydrogen bombs, this is accomplished by placing a fission bomb and fusion fuel ( tritium , deuterium , or lithium deuteride ) in proximity within a special, radiation-reflecting container. When the fission bomb is detonated, gamma rays and X-rays emitted first compress
23188-426: The establishment of an "international atomic development authority," which would actually own and control all military-applicable nuclear materials and activities, and (2) the creation of a system of automatic sanctions, which not even the U.N. Security Council could veto, and which would proportionately punish states attempting to acquire the capability to make nuclear weapons or fissile material . Baruch's plea for
23375-531: The export of sensitive technology from countries such as the UK and the United States through voluntary bodies such as the Nuclear Suppliers Group . The main concern of the IAEA is that uranium not be enriched beyond what is necessary for commercial civil plants, and that plutonium which is produced by nuclear reactors not be refined into a form that would be suitable for bomb production. Traditional safeguards are arrangements to account for and control
23562-407: The extension of assurances and mutual defence treaties to these states by nuclear powers, but other factors, such as national prestige, or specific historical experiences, also play a part in hastening or stopping nuclear proliferation. Dual-use technology refers to the possibility of military use of civilian nuclear power technology. Many technologies and materials associated with the creation of
23749-610: The face of ethnic cleansing. In 1994, the United Nations Assistance Mission for Rwanda failed to intervene in the Rwandan genocide in the face of Security Council indecision. In the late 1990s, UN-authorized international interventions took a wider variety of forms. The UN mission in the 1991–2002 Sierra Leone Civil War was supplemented by British Royal Marines and the UN-authorized 2001 invasion of Afghanistan
23936-596: The final battles of the Sri Lankan Civil War in 2009 concluded that the organization had suffered "systemic failure". In November/December 2014, Egypt presented a motion proposing an expansion of the NPT ( non-Proliferation Treaty ), to include Israel and Iran ; this proposal was due to increasing hostilities and destruction in the Middle-East connected to the Syrian Conflict as well as others. All members of
24123-498: The first of which were Australia, Brazil, Egypt, Mexico, the Netherlands and Poland. In 1965, the number of non-permanent members was expanded to ten. These ten non-permanent members are elected by the United Nations General Assembly for two-year terms starting on 1 January, with five replaced each year. To be approved, a candidate must receive at least two-thirds of all votes cast for that seat, which can result in deadlock if there are two roughly evenly matched candidates. In 1979,
24310-405: The fission bomb core. The external method of boosting enabled the USSR to field the first partially thermonuclear weapons, but it is now obsolete because it demands a spherical bomb geometry, which was adequate during the 1950s arms race when bomber aircraft were the only available delivery vehicles. The detonation of any nuclear weapon is accompanied by a blast of neutron radiation . Surrounding
24497-609: The five permanent members of the Security Council were the Republic of China , France (represented by the Provisional Government of the French Republic ), the Soviet Union , the United Kingdom, and the United States. There have been two major seat changes since then. China's seat was originally held by Chiang Kai-shek 's Nationalist Government , the Republic of China. However, the Nationalists were forced to retreat to
24684-553: The former USSR, the United Kingdom, France, Germany, Canada and Japan—but now includes 46 countries including all five nuclear weapons states . The International Framework for Nuclear Energy Cooperation is an international project involving 25 partner countries, 28 observer and candidate partner countries, and the International Atomic Energy Agency, the Generation IV International Forum, and
24871-420: The fusion fuel, then heat it to thermonuclear temperatures. The ensuing fusion reaction creates enormous numbers of high-speed neutrons , which can then induce fission in materials not normally prone to it, such as depleted uranium . Each of these components is known as a "stage", with the fission bomb as the "primary" and the fusion capsule as the "secondary". In large, megaton-range hydrogen bombs, about half of
25058-520: The globe, would make all life on the planet extinct. In connection with the Strategic Defense Initiative , research into the nuclear pumped laser was conducted under the DOD program Project Excalibur but this did not result in a working weapon. The concept involves the tapping of the energy of an exploding nuclear bomb to power a single-shot laser that is directed at a distant target. During
25245-475: The hopes raised by these successes as a "false renaissance" for the organization, given the more troubled missions that followed. Though the UN Charter had been written primarily to prevent aggression by one nation against another, in the early 1990s, the UN faced a number of simultaneous, serious crises within nations such as Haiti, Mozambique and the former Yugoslavia. The UN mission to Bosnia faced "worldwide ridicule" for its indecisive and confused mission in
25432-477: The international non-proliferation regime. They possess or are quickly capable of assembling one or more nuclear weapons. They have remained outside the 1970 NPT. They are thus largely excluded from trade in nuclear plants or materials, except for safety-related devices for a few safeguarded facilities. In May 1998 India and Pakistan each exploded several nuclear devices underground. This heightened concerns regarding an arms race between them, with Pakistan involving
25619-407: The leading countries that have not signed the Additional Protocol are Egypt, which says it will not sign until Israel accepts comprehensive IAEA safeguards, and Brazil, which opposes making the protocol a requirement for international cooperation on enrichment and reprocessing, but has not ruled out signing. The greatest risk from nuclear weapons proliferation comes from countries that have not joined
25806-533: The main UN budget. As of November 2021 , there have been 12 peacekeeping missions with over 87,000 personnel from 121 countries, with a total annual budget of approximately $ 6.3 billion. In the century prior to the UN's creation, several international treaty organizations and conferences had been formed to regulate conflicts between nations, such as the International Committee of the Red Cross and
25993-509: The mainland, communist People's Republic of China replaced Republic of China with a seat on the Security Council; the vote was widely seen as a sign of waning US influence in the organization. With an increasing Third World presence and the failure of UN mediation in conflicts in the Middle East , Vietnam and Kashmir , the UN increasingly shifted its attention to its ostensibly secondary goals of economic development and cultural exchange. By
26180-496: The majority of their energy from nuclear fission reactions alone, and those that use fission reactions to begin nuclear fusion reactions that produce a large amount of the total energy output. All existing nuclear weapons derive some of their explosive energy from nuclear fission reactions. Weapons whose explosive output is exclusively from fission reactions are commonly referred to as atomic bombs or atom bombs (abbreviated as A-bombs ). This has long been noted as something of
26367-516: The members. A negative vote or a "veto" by a permanent member prevents adoption of a proposal, even if it has received the required votes. Abstention is not regarded as a veto in most cases, though all five permanent members must vote for adopting any amendment of the UN Charter. Procedural matters cannot be vetoed, so the veto right cannot be used to avoid discussion of an issue. The same holds for certain non-binding decisions that directly regard permanent members. Most vetoes have been used for blocking
26554-407: The midst of the Cold War. It highlighted the dangers posed by nuclear weapons and called for world leaders to seek peaceful resolutions to international conflict. The signatories included eleven pre-eminent intellectuals and scientists, including Albert Einstein , who signed it just days before his death on April 18, 1955. A few days after the release, philanthropist Cyrus S. Eaton offered to sponsor
26741-536: The military establishment have questioned the usefulness of such weapons in the current military climate. According to an advisory opinion issued by the International Court of Justice in 1996, the use of (or threat of use of) such weapons would generally be contrary to the rules of international law applicable in armed conflict, but the court did not reach an opinion as to whether or not the threat or use would be lawful in specific extreme circumstances such as if
26928-408: The missiles before they land or implementing civil defense measures using early-warning systems to evacuate citizens to safe areas before an attack. Weapons designed to threaten large populations or to deter attacks are known as strategic weapons . Nuclear weapons for use on a battlefield in military situations are called tactical weapons . Critics of nuclear war strategy often suggest that
27115-483: The new Secretary-General to the General Assembly and recommends new states for admission as member states of the United Nations . The Security Council has traditionally interpreted its mandate as covering only military security, though US Ambassador Richard Holbrooke controversially persuaded the body to pass a resolution on HIV/AIDS in Africa in 2000. Under Chapter VI of the Charter, "Pacific Settlement of Disputes",
27302-508: The non-NPT states (India, Pakistan and Israel), facility-specific safeguards apply. IAEA inspectors regularly visit these facilities to verify completeness and accuracy of records. The terms of the NPT cannot be enforced by the IAEA itself, nor can nations be forced to sign the treaty. In reality, as shown in Iraq and North Korea , safeguards can be backed up by diplomatic, political and economic measures. While traditional safeguards easily verified
27489-452: The nuclear fuel cycle, necessary because of its outspoken rejection of the NPT. Due to economic and technological isolation of India after the nuclear tests in 1974, India has largely diverted focus on developing and perfecting the fast breeder technology by intensive materials and fuel cycle research at the dedicated center established for research into fast reactor technology, Indira Gandhi Center for Atomic Research (IGCAR) at Kalpakkam , in
27676-401: The nuclear material being audited. Inspections by the IAEA are complemented by other measures such as surveillance cameras and instrumentation. The inspections act as an alert system providing a warning of the possible diversion of nuclear material from peaceful activities. The system relies on; All NPT non-weapons states must accept these full-scope safeguards. In the five weapons states plus
27863-599: The one hand, they include bodies such as the Security Council Committee on Admission of New Members. On the other hand, both the International Criminal Tribunal for the former Yugoslavia and the International Criminal Tribunal for Rwanda were also created as subsidiary bodies of the Security Council. The by now numerous Sanctions Committees established in order to oversee implementation of the various sanctions regimes are also subsidiary bodies of
28050-485: The only UN body with authority to issue resolutions that are binding on member states. Like the UN as a whole, the Security Council was created after World War II to address the failings of the League of Nations in maintaining world peace . It held its first session on 17 January 1946 but was largely paralyzed in the following decades by the Cold War between the United States and the Soviet Union (and their allies). Nevertheless, it authorized military interventions in
28237-506: The permanent member to cast a formal veto. By the time a resolution reaches the Security Council Chamber, it has already been discussed, debated and amended in the consultations. The open meeting of the Security Council is merely a public ratification of a decision that has already been reached in private. For example, Resolution 1373 was adopted without public debate in a meeting that lasted just five minutes. The Security Council holds far more consultations than public meetings. In 2012,
28424-450: The possibility of nuclear warfare (up to and including the so-called countervalue targeting of civilians with nuclear weapons), de-stabilize international or regional relations, or infringe upon the national sovereignty of nation states . Four countries besides the five recognized Nuclear Weapon States have acquired, or are presumed to have acquired, nuclear weapons: India , Pakistan , North Korea , and Israel . None of these four are
28611-399: The precedent that permanent members could use the veto on matters outside of immediate concerns of war and peace. The Soviet Union went on to veto matters including the admission of Austria, Cambodia, Ceylon, Finland, Ireland, Italy, Japan, Laos, Libya, Nepal, Portugal, South Vietnam and Transjordan as UN member states, delaying their joining by several years. The United Kingdom and France used
28798-615: The president in the very middle flanked by the Secretary on the right and the Undersecretary on the left. The other representatives are placed in clockwise order alphabetically from the president leaving two seats at the ends of the table for guest speakers. The seating order of the members is then rotated each month as the presidency changes. Because of the public nature of meetings in the Security Council Chamber , delegations use
28985-540: The primary meeting format for the Security Council. In 1994, the French ambassador complained to the Secretary-General that "informal consultations have become the Council's characteristic working method, whilst public meetings, originally the norm, are increasingly rare and increasingly devoid of content: everyone knows that when the Council goes into public meeting everything has been decided in advance". When Russia funded
29172-597: The quality of policy formulation and implementation"), and a strong degree of regulatory competence. At present, 189 countries are States Parties to the Treaty on the Nonproliferation of Nuclear Weapons , more commonly known as the Nuclear Non-Proliferation Treaty or NPT. These include the five Nuclear Weapons States (NWS) recognized by the NPT: the People's Republic of China , France , Russian Federation ,
29359-538: The reach of industrialized nations. Since its founding by the United Nations in 1957, the International Atomic Energy Agency (IAEA) has promoted two, sometimes contradictory, missions: on the one hand, the Agency seeks to promote and spread internationally the use of civilian nuclear energy; on the other hand, it seeks to prevent, or at least detect, the diversion of civilian nuclear energy to nuclear weapons, nuclear explosive devices or purposes unknown. The IAEA now operates
29546-428: The remains of the split atomic nuclei. Many fission products are either highly radioactive (but short-lived) or moderately radioactive (but long-lived), and as such, they are a serious form of radioactive contamination . Fission products are the principal radioactive component of nuclear fallout . Another source of radioactivity is the burst of free neutrons produced by the weapon. When they collide with other nuclei in
29733-426: The renovation of the consultation room in 2013, the Russian ambassador called it "quite simply, the most fascinating place in the entire diplomatic universe". Only members of the Security Council are permitted in the conference room for consultations. The press is not admitted, and other members of the United Nations cannot be invited into the consultations. No formal record is kept of the informal consultations. As
29920-419: The scope of these agreements. If a nuclear-capable country does leave the NPT, it is likely to be reported by the IAEA to the United Nations Security Council , just as if it were in breach of its safeguards agreement. Trade sanctions would then be likely. IAEA safeguards can help ensure that uranium supplied as nuclear fuel and other nuclear supplies do not contribute to nuclear weapons proliferation. In fact,
30107-409: The spread of nuclear weapons did not begin until the early 1960s, after four nations (the United States, the Soviet Union, the United Kingdom and France) had acquired nuclear weapons (see List of states with nuclear weapons for more information). Although these efforts stalled in the early 1960s, they renewed once again in 1964, after China detonated a nuclear weapon. In 1968, governments represented at
30294-402: The surrounding material, the neutrons transmute those nuclei into other isotopes, altering their stability and making them radioactive. The most commonly used fissile materials for nuclear weapons applications have been uranium-235 and plutonium-239 . Less commonly used has been uranium-233 . Neptunium-237 and some isotopes of americium may be usable for nuclear explosives as well, but it
30481-496: The survival of the state were at stake. Another deterrence position is that nuclear proliferation can be desirable. In this case, it is argued that, unlike conventional weapons, nuclear weapons deter all-out war between states, and they succeeded in doing this during the Cold War between the US and the Soviet Union . In the late 1950s and early 1960s, Gen. Pierre Marie Gallois of France, an adviser to Charles de Gaulle , argued in books like The Balance of Terror: Strategy for
30668-424: The television cameras. In 2016, the Security Council held 150 consultations, 19 private meetings and 68 public meetings. Article 29 of the Charter provides that the Security Council can establish subsidiary bodies in order to perform its functions. This authority is also reflected in Rule 28 of the Provisional Rules of Procedure. The subsidiary bodies established by the Security Council are extremely heterogenous. On
30855-419: The treaty if they forswear nuclear weapons. Research into the development of nuclear weapons was initially undertaken during World War II by the United States (in cooperation with the United Kingdom and Canada), Germany, Japan, and the USSR. The United States was the first and is the only country to have used a nuclear weapon in war, when it used two bombs against Japan in August 1945. After surrendering to end
31042-400: The unanimity principle. "You may, if you wish," he said, "go home from this Conference and say that you have defeated the veto. But what will be your answer when you are asked: 'Where is the Charter? ' " As of 2012 , 269 vetoes had been cast since the Security Council's inception. In this period, China used the veto 9 times, France 18, the Soviet Union or Russia 128, the United Kingdom 32, and
31229-449: The use of armed force "to maintain or restore international peace and security." This was the legal basis for UN armed action in Korea in 1950 during the Korean War and the use of coalition forces in Iraq and Kuwait in 1991 and Libya in 2011. Decisions taken under Chapter VII, such as economic sanctions , are binding on UN members; the Security Council is the only UN body with authority to issue binding resolutions. The Rome Statute of
31416-531: The use of nuclear materials. This verification is a key element in the international system which ensures that uranium in particular is used only for peaceful purposes. Parties to the NPT agree to accept technical safeguard measures applied by the IAEA. These require that operators of nuclear facilities maintain and declare detailed accounting records of all movements and transactions involving nuclear material. Over 550 facilities and several hundred other locations are subject to regular inspection, and their records and
31603-406: The veto power of Security Council permanent members. Due to the fear that rejecting the strong veto would cause the conference's failure, his proposal was defeated twenty votes to ten. The UN officially came into existence on 24 October 1945 upon ratification of the Charter by the five then-permanent members of the Security Council and by a majority of the other 46 signatories. On 17 January 1946,
31790-432: The veto rights of permanent members. The Soviet delegation argued that each nation should have an absolute veto that could block matters from even being discussed, whilst the British argued that nations should not be able to veto resolutions on disputes to which they were a party. At the Yalta Conference of February 1945, the American, British and Russian delegations agreed that each of the "Big Five" could veto any action by
31977-457: The veto to avoid Security Council condemnation of their actions in the 1956 Suez Crisis. The first veto by the United States came in 1970, blocking General Assembly action in Southern Rhodesia . From 1985 to 1990, the US vetoed 27 resolutions, primarily to block resolutions perceived as anti-Israel but also to protect its interests in Panama and Korea. The Soviet Union, the United States and China have all vetoed candidates for Secretary-General, with
32164-510: The war, Germany and Japan ceased to be involved in any nuclear weapon research. In August 1949, the USSR tested a nuclear weapon , becoming the second country to detonate a nuclear bomb. The United Kingdom first tested a nuclear weapon in October 1952. France first tested a nuclear weapon in 1960. The People's Republic of China detonated a nuclear weapon in 1964. India conducted its first nuclear test in 1974, which prompted Pakistan to develop its own nuclear program and, when India conducted
32351-446: The weapon system and difficult to defend against the delivery of the weapon during a potential conflict. This can mean keeping weapon locations hidden, such as deploying them on submarines or land mobile transporter erector launchers whose locations are difficult to track, or it can mean protecting weapons by burying them in hardened missile silo bunkers. Other components of nuclear strategies included using missile defenses to destroy
32538-631: The world where there exists a single nuclear-weapon state. Aside from the public opinion that opposes proliferation in any form, there are two schools of thought on the matter: those, like Mearsheimer, who favored selective proliferation, and Waltz, who was somewhat more non- interventionist . Interest in proliferation and the stability-instability paradox that it generates continues to this day, with ongoing debate about indigenous Japanese and South Korean nuclear deterrent against North Korea . The threat of potentially suicidal terrorists possessing nuclear weapons (a form of nuclear terrorism ) complicates
32725-470: The world's longing for peace and security." With this remark, Baruch helped launch the field of nuclear ethics , to which many policy experts and scholars have contributed. Although the Baruch Plan enjoyed wide international support, it failed to emerge from the UNAEC because the Soviet Union planned to veto it in the Security Council. Still, it remained official American policy until 1953, when President Eisenhower made his " Atoms for Peace " proposal before
32912-443: The world's most powerful military forces ever since. They annually topped the list of countries with the highest military expenditures . In 2013, they spent over US$ 1 trillion combined on defence, accounting for over 55% of global military expenditures (the US alone accounting for over 35%). They are also amongst the world's largest arms exporters and are the only nations officially recognized as " nuclear-weapon states " under
33099-491: The worldwide application of those safeguards and the substantial world trade in uranium for nuclear electricity make the proliferation of nuclear weapons much less likely. The Additional Protocol, once it is widely in force, will provide credible assurance that there are no undeclared nuclear materials or activities in the states concerned. This will be a major step forward in preventing nuclear proliferation. The Nuclear Suppliers Group communicated its guidelines, essentially
33286-624: The yield comes from the final fissioning of depleted uranium. Virtually all thermonuclear weapons deployed today use the "two-stage" design described to the right, but it is possible to add additional fusion stages—each stage igniting a larger amount of fusion fuel in the next stage. This technique can be used to construct thermonuclear weapons of arbitrarily large yield. This is in contrast to fission bombs, which are limited in their explosive power due to criticality danger (premature nuclear chain reaction caused by too-large amounts of pre-assembled fissile fuel). The largest nuclear weapon ever detonated,
33473-444: Was a "peaceful nuclear explosion." The country has at least three other research reactors including the tiny one which is exploring the use of thorium as a nuclear fuel, by breeding fissile U-233. In addition, an advanced heavy-water thorium cycle is under development. Nuclear weapons A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions , either fission (fission bomb) or
33660-431: Was coined to refer to the four major Allied countries: the United States, the United Kingdom, the Soviet Union and the Republic of China. and became the foundation of an executive branch of the United Nations, the Security Council. Following the 1943 Moscow Conference and Tehran Conference , in mid-1944, the delegations from the Allied " Big Four ", the Soviet Union , the UK, the US and the Republic of China , met for
33847-441: Was designed by the Norwegian architect Arnstein Arneberg and was a gift from Norway. The United Nations Security Council mural by Norwegian artist Per Krohg (1952) depicts a phoenix rising from its ashes, symbolic of the world's rebirth after World War II. The Security Council has also held meetings in cities including Nairobi , Kenya; Addis Ababa , Ethiopia; Panama City , Panama; and Geneva , Switzerland. In March 2010,
34034-417: Was expelled from the UN altogether with no opportunity for membership as a separate nation . After the dissolution of the Soviet Union in 1991, the Russian Federation was recognized as the legal successor state of the Soviet Union and maintained the latter's position on the Security Council. The five permanent members of the Security Council were the victorious powers in World War II and have maintained
34221-442: Was made at the meeting of the International Atomic Energy Agency (IAEA) in Vienna. As of February 2006 Iran formally announced that uranium enrichment within their borders has continued. Iran claims it is for peaceful purposes but the United Kingdom, France, Germany, and the United States claim the purpose is for nuclear weapon research and construction. India , Pakistan and Israel have been "threshold" countries in terms of
34408-433: Was overseen by NATO . In 2003, the US invaded Iraq despite failing to pass a UN Security Council resolution for authorization, prompting a new round of questioning of the organization's effectiveness. In the same decade, the Security Council intervened with peacekeepers in crises including the War in Darfur in Sudan and the Kivu conflict in the Democratic Republic of Congo. In 2013, an internal review of UN actions in
34595-460: Was signed with Russia for the country's first large nuclear power plant, comprising two VVER-1000 reactors, under a Russian-financed US$ 3 billion contract. The first unit is due to be commissioned in 2007. A further two Russian units are under consideration for the site. Nuclear power supplied 3.1% of India's electricity in 2000. Its weapons material appears to come from a Canadian-designed 40 MW "research" reactor which started up in 1960, well before
34782-744: Was the Special Atomic Demolition Munition , or SADM, sometimes popularly known as a suitcase nuke . This is a nuclear bomb that is man-portable, or at least truck-portable, and though of a relatively small yield (one or two kilotons) is sufficient to destroy important tactical targets such as bridges, dams, tunnels, important military or commercial installations, etc. either behind enemy lines or pre-emptively on friendly territory soon to be overtaken by invading enemy forces. These weapons require plutonium fuel and are particularly "dirty". They also demand especially stringent security precautions in their storage and deployment. Small "tactical" nuclear weapons were deployed for use as antiaircraft weapons. Examples include
34969-439: Was the first time in over five decades that two members agreed to do so. Usually, intractable deadlocks are resolved by the candidate countries withdrawing in favour of a third member state. The current elected members, with the regions they were elected to represent, are as follows: The role of president of the Security Council involves setting the agenda, presiding at its meetings and overseeing any crisis. The president
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