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Who has nukes?

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According to the counting rules in the Strategic Arms Reduction Treaty (START), the United States has an estimated 5,200 nuclear warheads and 2,700 operationally deployed warheads. REUTERS/Jung Yeon-Je/Pool

According to the counting rules in the Strategic Arms Reduction Treaty (START), the United States has an estimated 5,200 nuclear warheads and 2,700 operationally deployed warheads. REUTERS/Jung Yeon-Je/Pool

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Russia is estimated to have around 14,000 nuclear weapons, although the total is uncertain because there is no accurate count of tactical weapons. REUTERS/Denis Sinyakov

Russia is estimated to have around 14,000 nuclear weapons, although the total is uncertain because there is no accurate count of tactical weapons. REUTERS/Denis Sinyakov

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France has pared down its arsenal to approximately 300 nuclear warheads. REUTERS/Benoit Tessier

France has pared down its arsenal to approximately 300 nuclear warheads. REUTERS/Benoit Tessier

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Britain's nuclear stockpile consists of fewer than 200 strategic and "sub-strategic" warheads on four Vanguard-class nuclear-powered ballistic missile submarines. REUTERS/Luke MacGregor

Britain's nuclear stockpile consists of fewer than 200 strategic and "sub-strategic" warheads on four Vanguard-class nuclear-powered ballistic missile submarines. REUTERS/Luke MacGregor

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China is estimated to have about 400 strategic and tactical nuclear weapons, and stocks of fissile material sufficient to produce a much larger arsenal. REUTERS/David Gray

China is estimated to have about 400 strategic and tactical nuclear weapons, and stocks of fissile material sufficient to produce a much larger arsenal. REUTERS/David Gray

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India has formally declared itself a nuclear weapon state. New Delhi is likely to have manufactured weapons-grade plutonium for at least 100 warheads. REUTERS/Army Handout

India has formally declared itself a nuclear weapon state. New Delhi is likely to have manufactured weapons-grade plutonium for at least 100 warheads. REUTERS/Army Handout

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North Korea tested its first nuclear explosive device in October 2006 and its second in May 2009. REUTERS/Stringer

North Korea tested its first nuclear explosive device in October 2006 and its second in May 2009. REUTERS/Stringer

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Pakistan is believed to have stockpiled approximately 580-800 kg of highly enriched uranium, sufficient amounts to build 30-50 fission bombs. According to the United States, China helped Pakistan by providing nuclear-related materials, scientific expertise and technical assistance. REUTERS/Stringer

Pakistan is believed to have stockpiled approximately 580-800 kg of highly enriched uranium, sufficient amounts to build 30-50 fission bombs. According to the United States, China helped Pakistan by providing nuclear-related materials, scientific expertise and technical assistance. REUTERS/Stringer

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Israel is widely understood to possess a sizable nuclear arsenal but maintains a policy of nuclear ambiguity. Based on estimates of the plutonium production capacity of the Dimona reactor, Israel has approximately 100-200 advanced nuclear explosive devices. REUTERS/Jerry Lampen

Israel is widely understood to possess a sizable nuclear arsenal but maintains a policy of nuclear ambiguity. Based on estimates of the plutonium production capacity of the Dimona reactor, Israel has approximately 100-200 advanced nuclear explosive devices. REUTERS/Jerry Lampen

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