List of states with nuclear weapons

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Map of nuclear-armed states of the world
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NPT-designated nuclear weapon states (China, France, Russia, United Kingdom, United States)
Other states with nuclear weapons (India, North Korea, Pakistan)
Other states presumed to have nuclear weapons (Israel)
NATO or CSTO member nuclear weapons sharing states (Belgium, Germany, Italy, Netherlands, Turkey, Belarus)
States formerly possessing nuclear weapons (Kazakhstan, South Africa, Ukraine) Nuclear weapons states 2023.svg
Map of nuclear-armed states of the world
   NPT-designated nuclear weapon states (China, France, Russia, United Kingdom, United States)
  Other states with nuclear weapons (India, North Korea, Pakistan)
  Other states presumed to have nuclear weapons (Israel)
  States formerly possessing nuclear weapons (Kazakhstan, South Africa, Ukraine)

Eight sovereign states have publicly announced successful detonation of nuclear weapons. [1] Five are considered to be nuclear-weapon states (NWS) under the terms of the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). In order of acquisition of nuclear weapons, these are the United States, Russia (the successor of the former Soviet Union), the United Kingdom, France, and China. Of these, the three NATO members, the United Kingdom, the United States, and France, are sometimes termed the P3. [2]

Contents

Other states that possess nuclear weapons are India, Pakistan, and North Korea. Since the NPT entered into force in 1970, these three states were not parties to the Treaty and have conducted overt nuclear tests. North Korea had been a party to the NPT but withdrew in 2003.

Israel is also generally understood to have nuclear weapons, but does not acknowledge it, maintaining a policy of deliberate ambiguity. [3] Israel is estimated to possess somewhere between 75 and 400 nuclear warheads. [4] [5] One possible motivation for nuclear ambiguity is deterrence with minimum political friction. [6] [7]

States that formerly possessed nuclear weapons are South Africa (developed nuclear weapons but then disassembled its arsenal before joining the NPT) [8] and the former Soviet republics of Belarus, Kazakhstan, and Ukraine, whose weapons were transferred to Russia.

According to the Federation of American Scientists there are approximately 3,880 active nuclear warheads and 12,119 total nuclear warheads in the world as of 2024. [9] The Stockholm International Peace Research Institute (SIPRI) estimated in 2023 that the total number of nuclear warheads acquired by nuclear states reached 12,512. Approximately 9,576 are kept with military stockpiles. About 3,844 warheads are deployed with missiles. 2,000 warheads, which are primarily from Russia and the United States, are maintained for high operational alerts. [10]

Statistics and force configuration

Global nuclear stockpiles, January 2023 WNF Map 2023.png
Global nuclear stockpiles, January 2023

The following is a list of states that have acknowledged the possession of nuclear weapons or are presumed to possess them, the approximate number of warheads under their control, and the year they tested their first weapon and their force configuration. This list is informally known in global politics as the "Nuclear Club". [11] [12] With the exception of Russia and the United States (which have subjected their nuclear forces to independent verification under various treaties) these figures are estimates, in some cases quite unreliable estimates. In particular, under the Strategic Offensive Reductions Treaty thousands of Russian and US nuclear warheads are inactive in stockpiles awaiting processing. The fissile material contained in the warheads can then be recycled for use in nuclear reactors.

From a high of 70,300 active weapons in 1986, as of 2024 there are approximately 3,880 active nuclear warheads and 12,119 total nuclear warheads in the world. [9] Many of the decommissioned weapons were simply stored or partially dismantled, not destroyed. [13]

Additionally, since the dawn of the Atomic Age, the delivery methods of most states with nuclear weapons have evolved—with four acquiring a nuclear triad, while others have consolidated away from land and air deterrents to submarine-based forces.

Overview of nuclear states and their capacities
Country
Warheads [a]
First test
NPT status [14]
CTBT status [15]
Delivery method
Tests [16]
Total [17] Deployed [17] DateSite Sea Air Land Notes
Flag of the United States.svg United States [9] 5,0441,77016 July 1945 ( Trinity ) Alamogordo, New Mexico PartySignatory Symbol confirmed.svg Symbol confirmed.svg Symbol confirmed.svg US triad [18] 1,030
Flag of Russia.svg Russian Federation [b] [19] 5,5801,71029 August 1949 ( RDS-1 ) Semipalatinsk, Kazakh SSR PartySignatory (ratified, but later revoked ratification) [20] Symbol confirmed.svg Symbol confirmed.svg Symbol confirmed.svg Russian triad [18] 715
Flag of the United Kingdom.svg United Kingdom [1] [9] [21] 2251203 October 1952 ( Hurricane ) Monte Bello Islands, Australia PartyRatifier Symbol confirmed.svg Symbol oppose vote.svg Symbol oppose vote.svg Trident submarines [22] [c] 45
Flag of France.svg France [1] [9] [23] 29028013 February 1960 ( Gerboise Bleue ) Reggane, French Algeria PartyRatifier Symbol confirmed.svg Symbol confirmed.svg Symbol oppose vote.svg Triomphant submarines, air capability [24] [d] 210
Flag of China.svg China [1] [9] [21] [25] 5002416 October 1964 ( 596 ) Lop Nur, Xinjiang PartySignatory Symbol confirmed.svg Symbol confirmed.svg Symbol confirmed.svg Chinese triad [26] [27] 45
Flag of India.svg India [1] [9] [21] [28] 172018 May 1974 ( Smiling Buddha ) Pokhran, Rajasthan Non-partyNon-signatory Symbol confirmed.svg Symbol confirmed.svg Symbol confirmed.svg Indian triad [29] [30] [31] [32] 6
Flag of Pakistan.svg Pakistan [1] [21] [33] [9] 170 [34] 028 May 1998 ( Chagai-1 ) Ras Koh Hills, Balochistan Non-partyNon-signatory Symbol confirmed.svg Symbol confirmed.svg Symbol confirmed.svg Pakistani triad [35] [36] 2
Flag of Israel.svg Israel [1] [21] [37] 900 1960–1979 [38] [e] UnknownNon-partySignatory Pictogram-voting question.svg Pictogram-voting question.svg Pictogram-voting question.svg Suspected Israeli triad [40] [41] Unknown
Flag of North Korea.svg North Korea [1] [9] [21] [42] 500 9 October 2006 [43] Kilju, North Hamgyong Announced withdrawal [44] Non-signatory Symbol confirmed.svg Symbol oppose vote.svg Symbol confirmed.svg North Korean delivery systems [45] 6

Percentage of global nuclear warheads by country

  Russia (45.4%)
  United States (42.7%)
  China (4.1%)
  France (2.4%)
  United Kingdom (1.8%)
  India (1.4%)
  Pakistan (1.3%)
  Israel (0.7%)
  North Korea (0.2%)

Recognized nuclear-weapon states

These five states are known to have detonated a nuclear explosive before 1 January 1967 and are thus nuclear weapons states under the Treaty on the Non-Proliferation of Nuclear Weapons. They also happen to be the UN Security Council's (UNSC) permanent members with veto power on UNSC resolutions.

United States

An early stage in the "Trinity" fireball, the first man-made nuclear explosion, 1945 Trinity Test Fireball 16ms.jpg
An early stage in the "Trinity" fireball, the first man-made nuclear explosion, 1945

The United States developed the first nuclear weapons during World War II in cooperation with the United Kingdom and Canada as part of the Manhattan Project, out of the apprehension that Nazi Germany would develop them first. It tested the first nuclear weapon on 16 July 1945 ("Trinity") at 5:30 am, and remains the only country to have used nuclear weapons in war, having bombed the Japanese cities of Hiroshima and Nagasaki in the closing stages of World War II. The project expenditure through 1 October 1945 was reportedly $1.845–$2 billion, in nominal terms, [46] [47] roughly 0.8 percent of the US GDP in 1945 and equivalent to about $32.5 billion today. [48]

The United States was the first nation to develop the hydrogen bomb, testing an experimental prototype in 1952 ("Ivy Mike") and a deployable weapon in 1954 ("Castle Bravo"). Throughout the Cold War it continued to modernize and enlarge its nuclear arsenal, but from 1992 on has been involved primarily in a program of stockpile stewardship. [49] [50] [51] [52] The US nuclear arsenal contained 31,175 warheads at its Cold War height (in 1966). [53] During the Cold War, the United States built more nuclear weapons than all other nations at approximately 70,000 warheads. [54] [55]

Russia (successor to the Soviet Union)

US and USSR/Russian nuclear weapons stockpiles, 1945-2014 US and USSR nuclear stockpiles.svg
US and USSR/Russian nuclear weapons stockpiles, 1945–2014

The Soviet Union tested its first nuclear weapon ("RDS-1") in 1949. This crash project was developed partially with information obtained via the atomic spies at the United States' Manhattan Project during and after World War II. The Soviet Union was the second nation to have developed and tested a nuclear weapon. It tested its first megaton-range hydrogen bomb ("RDS-37") in 1955. The Soviet Union also tested the most powerful explosive ever detonated by humans, ("Tsar Bomba"), with a theoretical yield of 100 megatons, reduced to 50 when detonated. After its dissolution in 1991, the Soviet weapons entered officially into the possession of its successor state, the Russian Federation. [56] The Soviet nuclear arsenal contained some 45,000 warheads at its peak (in 1986), more than any other nation had possessed at any point in history; the Soviet Union built about 55,000 nuclear warheads since 1949. [55]

United Kingdom

A Trident missile launched from a Royal Navy Vanguard-class ballistic missile submarine Trident II missile image.jpg
A Trident missile launched from a Royal Navy Vanguard-class ballistic missile submarine

The United Kingdom tested its first nuclear weapon ("Hurricane") in 1952. The UK had provided considerable impetus and initial research for the early conception of the atomic bomb, aided by Austrian, German and Polish physicists working at British universities who had either fled or decided not to return to Nazi Germany or Nazi-controlled territories. The UK collaborated closely with the United States and Canada during the Manhattan Project, but had to develop its own method for manufacturing and detonating a bomb as US secrecy grew after 1945. The United Kingdom was the third country in the world, after the United States and the Soviet Union, to develop and test a nuclear weapon. Its programme was motivated to have an independent deterrent against the Soviet Union, while also maintaining its status as a great power. It tested its first hydrogen bomb in 1957 (Operation Grapple), making it the third country to do so after the United States and Soviet Union. [57] [58]

The British Armed Forces maintained a fleet of V bomber strategic bombers and ballistic missile submarines (SSBNs) equipped with nuclear weapons during the Cold War. The Royal Navy currently maintains a fleet of four Vanguard-class ballistic missile submarines equipped with Trident II missiles. In 2016, the UK House of Commons voted to renew the British nuclear weapons system with the Dreadnought-class submarine, without setting a date for the commencement of service of a replacement to the current system.

France

American nuclear-powered carrier USS Enterprise (left) and French nuclear-powered aircraft carrier Charles de Gaulle (right), each of which carries nuclear-capable warplanes USS Enterprise FS Charles de Gaulle.jpg
American nuclear-powered carrier USS Enterprise (left) and French nuclear-powered aircraft carrier Charles de Gaulle (right), each of which carries nuclear-capable warplanes

France tested its first nuclear weapon in 1960 ("Gerboise Bleue"), based mostly on its own research. It was motivated by the Suez Crisis diplomatic tension in relation to both the Soviet Union and its allies, the United States and United Kingdom. It was also relevant to retain great power status, alongside the United Kingdom, during the post-colonial Cold War (see: Force de frappe). France tested its first hydrogen bomb in 1968 ("Opération Canopus"). After the Cold War, France has disarmed 175 warheads with the reduction and modernization of its arsenal that has now evolved to a dual system based on submarine-launched ballistic missiles (SLBMs) and medium-range air-to-surface missiles (Rafale fighter-bombers). However, new nuclear weapons are in development and reformed nuclear squadrons were trained during Enduring Freedom operations in Afghanistan.[ citation needed ]

France acceded to the Nuclear Non-Proliferation Treaty in 1992. [59] In January 2006, President Jacques Chirac stated a terrorist act or the use of weapons of mass destruction against France would result in a nuclear counterattack. [60] In February 2015, President François Hollande stressed the need for a nuclear deterrent in "a dangerous world". He also detailed the French deterrent as "fewer than 300" nuclear warheads, three sets of 16 submarine-launched ballistic missiles and 54 medium-range air-to-surface missiles and urged other states to show similar transparency. [61]

China

Mushroom cloud from China's first nuclear test, Project 596 1965-01 1964Nian Shou Ci Yuan Zi Dan Bao Zha 2.jpg
Mushroom cloud from China's first nuclear test, Project 596

China tested its first nuclear weapon device ("596") in 1964 at the Lop Nur test site. The weapon was developed as a deterrent against both the United States and the Soviet Union. Two years later, China had a fission bomb capable of being put onto a nuclear missile. It tested its first hydrogen bomb ("Test No. 6") in 1967, 32 months after testing its first nuclear weapon (the shortest fission-to-fusion development known in history). [62] China is the only NPT nuclear-weapon state to give an unqualified negative security assurance with its "no first use" policy. [63] [64] China acceded to the Nuclear Non-Proliferation Treaty in 1992. [59] As of 2016, China fielded SLBMs onboard its JL-2 submarines. [65] As of February 2024, China had an estimated total inventory of approximately 500 warheads. [66]

According to Stockholm International Peace Research Institute (SIPRI), China is in the middle of a significant modernization and expansion of its nuclear arsenal. Its nuclear stockpile is expected to continue growing over the coming decade and some projections suggest that it will deploy at least as many intercontinental ballistic missiles (ICBMs) as either Russia or the US in that period. However, China's overall nuclear warhead stockpile is still expected to remain smaller than that of either of those states. [10] The Yearbook published by SIPRI in 2024 revealed that China's nuclear warheads stockpile increased by 90 in 2023, reaching 500 warheads. [67]

US Department of Defense officials estimate that the Chinese had more than 600 operational nuclear warheads as of December 2024, and it was on track to posess 1,000 nuclear weapons by the year 2030. [68]

States declaring possession of nuclear weapons

India

Agni-V during its first test flight on 19 April 2012 Agni-V during its first test flight.jpg
Agni-V during its first test flight on 19 April 2012

India is not a party to the Nuclear Non-Proliferation Treaty. Indian officials rejected the NPT in the 1960s on the grounds that it created a world of nuclear "haves" and "have-nots", arguing that it unnecessarily restricted "peaceful activity" (including "peaceful nuclear explosives"), and that India would not accede to international control of their nuclear facilities unless all other countries engaged in unilateral disarmament of their own nuclear weapons. The Indian position has also asserted that the NPT is in many ways a neo-colonial regime designed to deny security to post-colonial powers. [69]

The country tested what is called a "peaceful nuclear explosive" in 1974 (which became known as "Smiling Buddha"). The test was the first test developed after the creation of the NPT, and created new questions about how civilian nuclear technology could be diverted secretly to weapons purposes (dual-use technology). India's secret development caused great concern and anger particularly from nations that had supplied its nuclear reactors for peaceful and power generating needs, such as Canada. [70] After its 1974 test, India maintained that its nuclear capability was primarily "peaceful", but between 1988 and 1990 it apparently weaponized two dozen nuclear weapons for delivery by air. [71] In 1998 India tested weaponized nuclear warheads ("Operation Shakti"), including a thermonuclear device. [72] India adopted a "no first use" policy in 1998. [73]

In July 2005, US President George W. Bush and Indian Prime Minister Manmohan Singh announced a civil nuclear cooperation initiative [74] that included plans to conclude an Indo-US civilian nuclear agreement. This initiative came to fruition through a series of steps that included India's announced plan to separate its civil and military nuclear programs in March 2006, [75] the passage of the India–United States Civil Nuclear Agreement by the US Congress in December 2006, the conclusion of a US–India nuclear cooperation agreement in July 2007, [76] approval by the IAEA of an India-specific safeguards agreement, [77] agreement by the Nuclear Suppliers Group to a waiver of export restrictions for India, [78] approval by the US Congress [79] and culminating in the signature of US–India agreement for civil nuclear cooperation [80] in October 2008. The US State Department said it made it "very clear that we will not recognize India as a nuclear-weapon state". [81] The United States is bound by the Hyde Act with India and may cease all cooperation with India if India detonates a nuclear explosive device. The US had further said it is not its intention to assist India in the design, construction or operation of sensitive nuclear technologies through the transfer of dual-use items. [82] In establishing an exemption for India, the Nuclear Suppliers Group reserved the right to consult on any future issues which might trouble it. [83] As of June 2024, India was estimated to have a stockpile of 172 warheads. [17] [84] [9]

Pakistan

Debris erupts from a mountain during an underground nuclear weapon detonation carried out as part of Pakistan's Chaghai-I series of tests. Chagaiatomictests.jpg
Debris erupts from a mountain during an underground nuclear weapon detonation carried out as part of Pakistan's Chaghai-I series of tests.

Pakistan is also not a party to the Nuclear Non-Proliferation Treaty. Pakistan covertly developed nuclear weapons over decades, beginning in the late 1970s. Pakistan first delved into nuclear power after the establishment of its first nuclear power plant near Karachi with equipment and materials supplied mainly by western nations in the early 1970s. Pakistani Prime Minister Zulfiqar Ali Bhutto promised in 1971 that if India could build nuclear weapons then Pakistan would too, according to him: "We will develop Nuclear stockpiles, even if we have to eat grass." [85]

It is believed that Pakistan has possessed nuclear weapons since the mid-1980s. [86] The United States continued to certify that Pakistan did not possess such weapons until 1990, when sanctions were imposed under the Pressler Amendment, requiring a cutoff of US economic and military assistance to Pakistan. [87] In 1998, Pakistan conducted its first six nuclear tests at the Ras Koh Hills in response to the five tests conducted by India a few weeks before.

In 2004, the Pakistani metallurgist Abdul Qadeer Khan, a key figure in Pakistan's nuclear weapons program, confessed to heading an international black market ring involved in selling nuclear weapons technology. In particular, Khan had been selling gas centrifuge technology to North Korea, Iran, and Libya. Khan denied complicity by the Pakistani government or Army, but this has been called into question by journalists and IAEA officials, and was later contradicted by statements from Khan himself. [88]

As of early 2013, Pakistan was estimated to have had a stockpile of around 140 warheads, [89] and in November 2014 it was projected that by 2020 Pakistan would have enough fissile material for 200 warheads. [90] As of 2024, SIPRI estimated that Pakistan had a stockpile of around 170 warheads. [10]

North Korea

North Korea was a party to the Nuclear Non-Proliferation Treaty, but announced a withdrawal on 10 January 2003, after the United States accused it of having a secret uranium enrichment program and cut off energy assistance under the 1994 Agreed Framework. In February 2005, North Korea claimed to possess functional nuclear weapons, though their lack of a test at the time led many experts to doubt the claim. In October 2006, North Korea stated that, in response to growing intimidation by the United States, it would conduct a nuclear test to confirm its nuclear status. North Korea reported a successful nuclear test on 9 October 2006 (see 2006 North Korean nuclear test). Most US intelligence officials believed that the test was probably only partially successful with a yield of less than a kiloton. [91] [92] North Korea conducted a second, higher-yield test on 25 May 2009 (see 2009 North Korean nuclear test) and a third test with still-higher yield on 12 February 2013 (see 2013 North Korean nuclear test).

North Korea claimed to have conducted its first hydrogen-bomb test on 5 January 2016, though measurements of seismic disturbances indicate that the detonation was not consistent with a hydrogen bomb. [93] On 3 September 2017, North Korea detonated a device, which caused a magnitude 6.1 tremor, consistent with a low-powered thermonuclear detonation; NORSAR estimates the yield at 250 kilotons [94] of TNT. In 2018, North Korea announced a halt in nuclear weapons tests and made a conditional commitment to denuclearisation of the Korean Peninsula; [95] [96] however, in December 2019, it indicated it no longer considered itself bound by the moratorium. [97]

Kim Jong Un officially declared North Korea a nuclear weapons state during a speech on 9 September 2022, the country's foundation day. [98]

According to the Stockholm International Peace Research Institute (SIPRI), North Korea's military nuclear programme remains central to its national security strategy and it may have assembled up to 30 nuclear weapons and could produce more. North Korea conducted more than 90 ballistic missile tests during 2022, the highest number it has ever undertaken in a single year. [10]

States believed to possess nuclear weapons

Israel

Israel is generally understood to have been the sixth country to develop nuclear weapons, but does not acknowledge it. It had "rudimentary, but deliverable," nuclear weapons available as early as 1966. [99] [100] [101] [102] [103] [104] [6] [ excessive citations ] Israel is not a party to the NPT. Israel engages in strategic ambiguity, saying it would not be the first country to "introduce" nuclear weapons to the Middle East without confirming or denying that it has a nuclear weapons program or arsenal. This policy of "nuclear opacity" has been interpreted as an attempt to get the benefits of deterrence with a minimal political cost. [6] [7] Due to a US ban on funding countries that have weapons of mass destruction, Israel would lose around $2 billion a year in military and other aid from the US if it admitted to possessing nuclear weapons. [3]

According to the Natural Resources Defense Council and the Federation of American Scientists, Israel likely possesses around 80–400 nuclear weapons. [105] [104] The Stockholm International Peace Research Institute estimates that Israel has approximately 80 intact nuclear weapons, of which 50 are for delivery by Jericho II medium-range ballistic missiles and 30 are gravity bombs for delivery by aircraft. SIPRI also reports that there was renewed speculation in 2012 that Israel may also have developed nuclear-capable submarine-launched cruise missiles. [106]

On 7 November 2023, during the Israel–Hamas war, Heritage Minister Amihai Eliyahu said during a radio interview that a nuclear strike would be "one way" to deal with Gaza, which commentators and diplomats interpreted as a tacit admission that Israel possesses such a capability. His remarks were criticized by the United States and Russia, and Eliyahu was subsequently suspended from the Israeli cabinet. [107]

Launch authority

The decision to use nuclear weapons is always restricted to a single person or small group of people. The United States and France require their respective presidents to approve the use of nuclear weapons. In the US, the Presidential Emergency Satchel is always handled by a nearby aide unless the President is near a command center. The decision rests with the Prime Minister in the United Kingdom. Information from China is unclear, but "the launch of nuclear weapons is commonly believed to rest with the Central Military Commission of the Chinese Communist Party."[ citation needed ] Russia grants such power to the President but may also require approval from the Minister of Defence and the Chief of the General Staff. The Supreme Commander of the Armed Forces has authority in North Korea. India, Pakistan and Israel have committees for such a decision. [108]

Some countries are known to have delegated launch authority to military personnel in the event that the usual launch authority is incapacitated; whether or not the 'pre-delegated' authority exists at any particular time is kept secret. [109] In the United States, some military commanders have been delegated authority to launch nuclear weapons "when the urgency of time and circumstances clearly does not permit a specific decision by the President." [110] Russia has a semi automated Dead Hand system which may allow military commanders to act based on certain pre-defined criteria. British nuclear-armed submarine commanders are issued with "letters of last resort" written by the Prime Minister containing secret instructions which may or may not give them delegated launch authority. [111]

Launch authority of nuclear states
CountryAuthorityNotes
Flag of the United States.svg United States President of the United States See the Presidential Emergency Satchel. [108] [112]
Flag of Russia.svg Russia President of Russia Briefcases may also be issued to the Minister of Defence and the Chief of the General Staff. [108] [113] [114] [112]
Flag of the United Kingdom.svg United Kingdom Prime Minister of the United Kingdom The Prime Minister and a secretly designated 'second' may order a launch, but this may be challenged by Parliament. [108] [112]
Flag of France.svg France President of France The Chief of the Military Staff of the President of the Republic and the Chief of the Defence Staff may also be involved in decisions. [108] [112]
Flag of the People's Republic of China.svg China Central Military Commission The Chairman of the Central Military Commission is the Supreme Military Commander. [108] [112]
Flag of India.svg India Prime Minister of India Nuclear Command Authority includes an Executive Council and a Political Council. [108] [112]
Flag of Pakistan.svg Pakistan National Command Authority Approval from National Command Authority and requires a consensus of the council's members. [108] [112]
Flag of North Korea.svg North Korea President of the State Affairs The president of the State Affairs is the ultimate decisionmaker in regards to North Korea's nuclear arsenal. [115]
Flag of Israel.svg Israel Prime Minister of Israel Requires agreement of the Minister of Defense and Chief of the General Staff. [108]

Nuclear weapons sharing

Nuclear weapons shared by the United States

Weapons provided for nuclear sharing (2021) [116]
CountryBaseEstimated
Flag of Belgium (civil).svg  Belgium Kleine Brogel 20
Flag of Germany.svg  Germany Büchel 20
Flag of Italy.svg  Italy Aviano 20
Flag of Italy.svg  Italy Ghedi
Flag of the Netherlands.svg  Netherlands Volkel 20
Flag of Turkey.svg  Turkey Incirlik 20
100

Under NATO nuclear weapons sharing, the United States has provided nuclear weapons for Belgium, Germany, Italy, the Netherlands, and Turkey to deploy and store. [117] This involves pilots and other staff of the "non-nuclear" NATO states practicing, handling, and delivering the US nuclear bombs, and adapting non-US warplanes to deliver US nuclear bombs. However, since all US nuclear weapons are protected with Permissive Action Links, the host states cannot easily arm the bombs without authorization codes from the US Department of Defense. [118] Former Italian President Francesco Cossiga acknowledged the presence of US nuclear weapons in Italy. [119] US nuclear weapons were also deployed in Canada as well as Greece from 1963. However, the United States withdrew three of the four nuclear-capable weapons systems from Canada by 1972, the fourth by 1984, and all nuclear-capable weapons systems from Greece by 2001. [120] [121] As of April 2019, the United States maintained around 100 nuclear weapons in Europe, as reflected in the accompanying table. [116]

Nuclear weapons shared by Russia

Russian nuclear weapons in host countries
CountryAir baseWarheads
Flag of Belarus.svg  Belarus Probably Lida [122] ~130

Since June 2023, [122] the leaders of Russia and Belarus have claimed that a "number of" [123] nuclear weapons are located on Belarusian territory while remaining in Russian possession. [122] Sources hostile to these countries have confirmed that nuclear warheads have been delivered to Belarus, but claim that the first transfers were instead made in August 2023. [124] Russia's stated intention is to provide Belarus with two delivery systems: dual-capable Iskander-M missile systems and necessary training and modifications for Belarusian Su-25 aircraft to carry nuclear weapons. [125]

The deployment of Russian weapons to Belarus was framed by Russian President Vladimir Putin as being equivalent to the deployments of American nuclear weapons to NATO Allies in Europe under international law. [123]

Criticism of nuclear weapons sharing

Members of the Non-Aligned Movement have called on all countries to "refrain from nuclear sharing for military purposes under any kind of security arrangements." [126] The Institute of Strategic Studies Islamabad (ISSI) has criticized the arrangement for allegedly violating Articles I and II of the NPT, arguing that "these Articles do not permit the NWS to delegate the control of their nuclear weapons directly or indirectly to others." [127] NATO has argued that the weapons' sharing is compliant with the NPT because "the US nuclear weapons based in Europe are in the sole possession and under constant and complete custody and control of the United States." [128]

States formerly possessing nuclear weapons

Nuclear weapons have been present in many nations, often as staging grounds under control of other powers. However, in only one instance has a nation given up nuclear weapons after being in full control of them. The fall of the Soviet Union left several former Soviet republics in physical possession of nuclear weapons, although not operational control which was dependent on Russian-controlled electronic Permissive Action Links and the Russian command and control system. [129] [130] Of these, Kazakhstan and Ukraine continue to have neither their own nuclear weapons nor another state's nuclear weapons stationed in their territory whereas Belarus does again claim to have Russian-owned nuclear weapons stationed on its territory since 2023.

South Africa

Alleged spare bomb casings from South Africa's nuclear weapon programme. Their purpose is disputed. South African nuclear bomb casings.jpg
Alleged spare bomb casings from South Africa's nuclear weapon programme. Their purpose is disputed.

South Africa produced six nuclear weapons in the 1980s, but dismantled them in the early 1990s.

In 1979, there was a detection of a putative covert nuclear test in the Indian Ocean, called the Vela incident. It has long been speculated that it was a test by Israel, in collaboration with and with the support of South Africa, though this has never been confirmed. South Africa could not have constructed such a nuclear bomb by itself until November 1979, two months after the "double flash" incident. [132]

South Africa acceded to the Nuclear Non-Proliferation Treaty in 1991. [133] [134]

Former Soviet republics

In connection with their accession to the NPT, all three countries received assurances that their sovereignty, independence, and territorial integrity would be respected, as stated in the Budapest Memorandum on Security Assurances. These assurances have been flouted by Russia since the Russo-Ukrainian War began in 2014, during which Russia claimed to annex Crimea, occupied Eastern Ukraine, and in 2022, launched a full-scale invasion, with limited responses by the other signatories. [140] [141] [142]

Stationed countries

Up until the 1990s the US had stationed nuclear weapons outside of its territories and sharing countries. [143]

South Korea

Philippines

During the Cold War, specifically during the presidency of Ferdinand Marcos from 1965 to 1986, American nuclear warheads were secretly stockpiled in the Philippines. [144] [145]

Taiwan

Taiwan was developing capacities to construct nuclear weapons up until 1988. [146] [147] Before 1974, the United States stationed some of its arsenal in Taiwan. [148]

Japan

After World War II the US had nuclear weapons stationed in Japan until the 1970s.

Canada

The US stationed nuclear weapons at CFB Goose Bay in Labrador between 1964 and 1984. [149]

Greece

The US stationed nuclear weapons in Greece until they were removed in 2001. [150]

See also

Notes

  1. Estimates from the Federation of American Scientists. The latest update was in January 2023. "Deployed" indicates the total of deployed strategic and non-strategic warheads. Because the number of non-strategic warheads is unknown for many countries, this number should be taken as a minimum. When a range of weapons is given (e.g., 0–10), it generally indicates that the estimate is being made on the amount of fissile material that has likely been produced, and the amount of fissile material needed per warhead depends on estimates of a country's proficiency at nuclear weapon design.
  2. As a part of the Soviet Union. The Russian Federation has not tested a nuclear weapon since 1991.
  3. See also UK Trident programme. From the 1960s until the 1990s, the United Kingdom's Royal Air Force maintained the independent capability to deliver nuclear weapons via its V bomber fleet.
  4. See also Force de dissuasion. France formerly possessed a nuclear triad until 1996, when its land-based arsenal was retired.
  5. Data include the suspected Vela incident of 22 September 1979. [39]

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The Treaty on the Non-Proliferation of Nuclear Weapons, commonly known as the Non-Proliferation Treaty or NPT, is an international treaty whose objective is to prevent the spread of nuclear weapons and weapons technology, to promote cooperation in the peaceful uses of nuclear energy, and to further the goal of achieving nuclear disarmament and general and complete disarmament. Between 1965 and 1968, the treaty was negotiated by the Eighteen Nation Committee on Disarmament, a United Nations-sponsored organization based in Geneva, Switzerland.

<span class="mw-page-title-main">Nuclear proliferation</span> Spread of nuclear weapons

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 the possibility of nuclear warfare, de-stabilize international or regional relations, or infringe upon the national sovereignty of nation states.

<span class="mw-page-title-main">Nuclear disarmament</span> Act of eliminating nuclear weapons

Nuclear disarmament is the act of reducing or eliminating nuclear weapons. Its end state can also be a nuclear-weapons-free world, in which nuclear weapons are completely eliminated. The term denuclearization is also used to describe the process leading to complete nuclear disarmament.

<span class="mw-page-title-main">Nuclear warfare</span> Military conflict that deploys nuclear weaponry

Nuclear warfare, also known as atomic warfare, is a military conflict or prepared political strategy that deploys nuclear weaponry. Nuclear weapons are weapons of mass destruction; in contrast to conventional warfare, nuclear warfare can produce destruction in a much shorter time and can have a long-lasting radiological result. A major nuclear exchange would likely have long-term effects, primarily from the fallout released, and could also lead to secondary effects, such as "nuclear winter", nuclear famine, and societal collapse. A global thermonuclear war with Cold War-era stockpiles, or even with the current smaller stockpiles, may lead to various scenarios including human extinction.

<span class="mw-page-title-main">North Korea and weapons of mass destruction</span>

North Korea has a military nuclear weapons program and, as of 2024, is estimated to have an arsenal of approximately 50 nuclear weapons and sufficient production of fissile material for six to seven nuclear weapons per year. North Korea has also stockpiled a significant quantity of chemical and biological weapons. In 2003, North Korea withdrew from the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). Since 2006, the country has conducted six nuclear tests at increasing levels of expertise, prompting the imposition of sanctions.

<span class="mw-page-title-main">Nuclear arms race</span> Part of the Post-WWII era and the Cold War

The nuclear arms race was an arms race competition for supremacy in nuclear warfare between the United States, the Soviet Union, and their respective allies during the Cold War. During this same period, in addition to the American and Soviet nuclear stockpiles, other countries developed nuclear weapons, though no other country engaged in warhead production on nearly the same scale as the two superpowers.

<span class="mw-page-title-main">Russia and weapons of mass destruction</span>

The Russian Federation is known to possess or have possessed three types of weapons of mass destruction: nuclear weapons, biological weapons, and chemical weapons. It is one of the five nuclear-weapon states recognized under the Treaty on the Non-Proliferation of Nuclear Weapons and one of the four countries wielding a nuclear triad.

<span class="mw-page-title-main">United States and weapons of mass destruction</span>

The United States is known to have possessed three types of weapons of mass destruction: nuclear, chemical, and biological weapons. As the country that invented nuclear weapons, the U.S. is the only country to have used nuclear weapons on another country, when it detonated two atomic bombs over two Japanese cities of Hiroshima and Nagasaki during World War II. It had secretly developed the earliest form of the atomic weapon during the 1940s under the title "Manhattan Project". The United States pioneered the development of both the nuclear fission and hydrogen bombs. It was the world's first and only nuclear power for four years, from 1945 until 1949, when the Soviet Union produced its own nuclear weapon. The United States has the second-largest number of nuclear weapons in the world, after the Russian Federation.

<span class="mw-page-title-main">China and weapons of mass destruction</span>

The People's Republic of China has developed and possesses weapons of mass destruction, including chemical and nuclear weapons. The first of China's nuclear weapons tests took place in 1964, and its first hydrogen bomb test occurred in 1966 at Lop Nur. Tests continued until 1996, when the country signed the Comprehensive Nuclear-Test-Ban Treaty (CTBT), but did not ratify it. China acceded to the Biological Weapons Convention (BWC) in 1984 and ratified the Chemical Weapons Convention (CWC) in 1997. Since 2020, China has been wielding a nuclear triad, alongside four other countries.

<span class="mw-page-title-main">India and weapons of mass destruction</span>

India possesses nuclear weapons and previously developed chemical weapons. Although India has not released any official statements about the size of its nuclear arsenal, recent estimates suggest that India has 172 nuclear weapons and has produced enough weapons-grade plutonium for up to 200 nuclear weapons. In 1999, India was estimated to have 800 kilograms (1,800 lb) of separated reactor-grade plutonium, with a total amount of 8,300 kilograms (18,300 lb) of civilian plutonium, enough for approximately 1,000 nuclear weapons. India has conducted nuclear weapons tests in a pair of series namely Pokhran I and Pokhran II.

<span class="mw-page-title-main">Pakistan and weapons of mass destruction</span>

Pakistan is one of nine states that possess nuclear weapons. Pakistan began developing nuclear weapons in January 1972 under Prime Minister Zulfikar Ali Bhutto, who delegated the program to the Chairman of the Pakistan Atomic Energy Commission (PAEC) Munir Ahmad Khan with a commitment to having the device ready by the end of 1976. Since PAEC, which consisted of over twenty laboratories and projects under reactor physicist Munir Ahmad Khan, was falling behind schedule and having considerable difficulty producing fissile material, Abdul Qadeer Khan, a metallurgist working on centrifuge enrichment for Urenco, joined the program at the behest of the Bhutto administration by the end of 1974. Producing fissile material was pivotal to the Kahuta Project's success and thus to Pakistan obtaining the capability to detonate a nuclear weapon by the end of 1984.

<span class="mw-page-title-main">Nuclear sharing</span> Concept in NATOs nuclear deterrence policy

Nuclear sharing is a concept in NATO's policy of nuclear deterrence, which allows member countries without nuclear weapons of their own to participate in the planning for the use of nuclear weapons by NATO. In particular, it provides for involvement of the armed forces of those countries in delivering nuclear weapons in the event of their use.

<span class="mw-page-title-main">Nuclear weapons of the United States</span>

The United States was the first country to manufacture nuclear weapons and is the only country to have used them in combat, with the bombings of Hiroshima and Nagasaki in World War II against Japan. Before and during the Cold War, it conducted 1,054 nuclear tests, and tested many long-range nuclear weapons delivery systems.

<span class="mw-page-title-main">Tactical nuclear weapon</span> Nuclear weapon designed for use on a battlefield

A tactical nuclear weapon (TNW) or non-strategic nuclear weapon (NSNW) is a nuclear weapon that is designed to be used on a battlefield in military situations, mostly with friendly forces in proximity and perhaps even on contested friendly territory. Generally smaller in explosive power, they are defined in contrast to strategic nuclear weapons, which are designed mostly to be targeted at the enemy interior far away from the war front against military bases, cities, towns, arms industries, and other hardened or larger-area targets to damage the enemy's ability to wage war. As of 2024, no tactical nuclear weapons have ever been used in combat.

<span class="mw-page-title-main">Libya and weapons of mass destruction</span>

Libya pursued programs to develop or acquire weapons of mass destruction from when Muammar Gaddafi seized control of Libya in 1969 until he announced on 19 December 2003 that Libya would voluntarily eliminate all materials, equipment and programs that could lead to internationally proscribed weapons. This included weapons of mass destruction and long-range ballistic missiles.

This timeline of nuclear weapons development is a chronological catalog of the evolution of nuclear weapons rooting from the development of the science surrounding nuclear fission and nuclear fusion. In addition to the scientific advancements, this timeline also includes several political events relating to the development of nuclear weapons. The availability of intelligence on recent advancements in nuclear weapons of several major countries is limited because of the classification of technical knowledge of nuclear weapons development.

The 2010 Review Conference for the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) was held at United Nations Headquarters in New York City from 3 to 28 May 2010. The President of the Review Conference is Ambassador Libran N. Cabactulan of the Philippines. UN Secretary-General Ban Ki-moon used the opening of the conference to note that "sixty five years later, the world still lives under the nuclear shadow".

This article shows various estimates of the nuclear weapon stockpiles of various countries at various points in time. This article also shows the number of nuclear weapons tests conducted by each country at various points in time.

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