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List of countries with nuclear weapons

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Nuclear weapons

History of nuclear weapons
Nuclear warfare
Nuclear arms race
Weapon design / testing
Nuclear explosion
Delivery systems
Nuclear espionage
Proliferation
Countries
Nuclear weapons states
US · Russia · UK · France
China · India · Pakistan
Israel · North Korea
This is a list of countries with nuclear weapons. There are currently seven states that have successfully detonated nuclear weapons. Five are considered to be "nuclear weapons states", an internationally recognized status conferred by the Nuclear Non-Proliferation Treaty (NPT). In order of acquisition of nuclear weapons these are: the United States of America, Russia (formerly the Soviet Union), the United Kingdom, France, and the People's Republic of China. Since the formulation of the NPT, two non-signatory states of the NPT have conducted nuclear tests: India and Pakistan. Israel is also strongly suspected to have an arsenal of nuclear weapons though it has never confirmed or denied this, and there have been reports that over 100 nuclear weapons might be in its inventory. This status is not formally recognised by international bodies; none of these three countries is currently a signatory to the Nuclear Non-Proliferation Treaty. North Korea has publicly declared itself to possess nuclear weapons though it has not conducted any confirmed tests and its ultimate status is still unknown. Iran has been accused by Western nations of attempting to develop uranium enrichment technology for weapons purposes. As of February 4, 2006, the International Atomic Energy Agency referred Iran to the United Nations Security Council in response to Western concerns on their possible nuclear programs.

Estimated worldwide nuclear stockpiles

The following is a list of nations that have admitted the possession of nuclear weapons, the approximate number of warheads under their control in 2002, and the year they tested their first weapon. This list is informally known in global politics as the "Nuclear Club". Note that 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. Also, these figures represent total warheads possessed, rather than deployed. In particular, under the SORT treaty thousands of Russian and U.S. nuclear warheads are in inactive stockpiles awaiting processing. The radioactive fuel contained in the warheads can then be recycled for use in nuclear reactors that drive nuclear power plants and some military submarines and warships.

From a high of 65,000 active weapons in 1985, there were about 20,000 active nuclear weapons in the world in 2002. Many of the "decommissioned" weapons were simply stored or partially dismantled, not destroyed.Webster, Paul (July/August 2003). "Just like old times," Bulletin of the Atomic Scientists 59:4: 30-35. [link]

States which at one point had nuclear weapons and/or nuclear weapons research programs}}
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States which at one point had nuclear weapons and/or nuclear weapons research programs}}

Declared nuclear weapons states
Country Warheads active/total* Year of first test
United States 5,735/9,960Norris, Robert S. and Hans M. Kristensen. "U.S. nuclear forces, 2006," Bulletin of the Atomic Scientists 61:1 (January/February 2005): 68-71, [link] 1945 ("Trinity")
Russia (formerly the Soviet Union) 5,830/16,000Norris, Robert S. and Hans M. Kristensen. "Russian nuclear forces, 2006," Bulletin of the Atomic Scientists 62:2 (March/April 2006): 64-67, [link] 1949 ("RDS-1")
United Kingdom <200Norris, Robert S. and Hans M. Kristensen. "British nuclear forces, 2005," Bulletin of the Atomic Scientists 61:6 (November/December 2005): 77-79, [link] 1952 ("Hurricane")
France 350Norris, Robert S. and Hans M. Kristensen. "French nuclear forces, 2005," Bulletin of the Atomic Scientists 61:4 (July/August 2005): 73-75,[link] 1960 ("Gerboise Bleue")
People's Republic of China 130Norris, Robert S. and Hans M. Kristensen. "Chinese nuclear forces, 2006," Bulletin of the Atomic Scientists 62:3 (May/June 2006): 60-63, [link]; Lewis, Jeffery. "The ambiguous arsenal," Bulletin of the Atomic Scientists 61:3 (May/June 2005): 52-59. [link]. 1964 ("596")
India 75-115Norris, Robert S. and Hans M. Kristensen. "India's nuclear forces, 2005," Bulletin of the Atomic Scientists 61:5 (September/October 2005): 73-75,[link] 1974 ("Smiling Buddha")
Pakistan 65-90Norris, Robert S. and Hans M. Kristensen. "Pakistan's nuclear forces, 2001," Bulletin of the Atomic Scientists 58:1 (January/February 2002): 70-71,[link] 1998 ("Chagai-I")
North Korea 0-10Norris, Robert S. and Hans M. Kristensen. "North Korea's nuclear program, 2005," Bulletin of the Atomic Scientists 61:3 (May/June 2005): 64-67,[link] noneglobalsecurity.org. [Nuclear Weapons Testing - North Korean Statements]

*All numbers are estimates from the Natural Resources Defense Council, published in the Bulletin of the Atomic Scientists, unless other references are given. If differences between active and total stockpile are known, they are given as two figures separated by a forward slash. If no specifics are known, only one figure is given. Stockpile number may not contain all intact warheads if a substantial amount of warheads are scheduled for but have not yet gone through dismantlement; not all "active" warheads are deployed at any given time. When a spread of weapons is given (e.g., 0-10), it generally indicates that the estimate is being made on the amount of fissile material which 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.

States that have tested a nuclear weapon

An early stage in the "Trinity" fireball, the first nuclear explosion.
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An early stage in the "Trinity" fireball, the first nuclear explosion.

Suspected nuclear states

Countries believed to have at least one nuclear weapon, or programs with a realistic chance of producing a nuclear weapon in the near future:
On October 5, 1986, the British newspaper The Sunday Times ran Mordechai Vanunu's story on its front page under the headline: "Revealed — the secrets of Israel's nuclear arsenal."
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On October 5, 1986, the British newspaper The Sunday Times ran Mordechai Vanunu's story on its front page under the headline: "Revealed — the secrets of Israel's nuclear arsenal."

States suspected of having clandestine nuclear programs

The question of whether individual states without nuclear weapons are trying to develop them is often a controversial one. Accusations of clandestine nuclear programs are often vehemently denied, and may be politically motivated themselves, or simply erroneous. Below are countries who have been accused by a number of governments and intergovernmental agencies as currently attempting to develop nuclear weapons technology who are not suspected as yet having developed it.
At the Uraniums Conversion Facility in Isfahan, Iran, yellowcake is converted into uranium hexafluoride as part of Iran's nuclear fuel cycle, which has been alleged to be part of a clandestine attempt to develop nuclear weapons.
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At the Uraniums Conversion Facility in Isfahan, Iran, yellowcake is converted into uranium hexafluoride as part of Iran's nuclear fuel cycle, which has been alleged to be part of a clandestine attempt to develop nuclear weapons.

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