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Nuclear-Weapon States:
China: 100-200 warheads.
France: Approximately 350 strategic warheads.
Russia: 4,237 strategic warheads, approximately 2,000-3,000 operational tactical warheads, and approximately 8,000-10,000 stockpiled strategic and tactical warheads.
United Kingdom: Less than 160 deployed strategic warheads.
United States: 5,914 strategic warheads, approximately 1,000 operational tactical weapons, and approximately 3,000 reserve strategic and tactical warheads.
Defacto Nuclear-Weapon States:
India: Up to 100 nuclear warheads.
Israel: Between 75 to 200 nuclear warheads.
Pakistan: Up to 60 nuclear warheads.
States of Immediate Proliferation Concern:
Iran: The International Atomic Energy Agency (IAEA) is continuing its investigation and monitoring of Tehran’s nuclear program.
North Korea: Has separated enough plutonium for up to 12 nuclear warheads.
Syria: Sometimes named by U.S. officials as seeking nuclear weapons.
Abolishing Nuclear Weapons: Why the United States Should Lead
The Winning Weapon? Rethinking Nuclear Weapons in Light of Hiroshima
Nuclear Weapons: The Challenges Ahead
U.S. Nuclear Weapons Policy
Iranian Nuclear Weapons? Iran's Missiles and Possible Delivery Systems
The International Atomic Energy Agency (IAEA)
http://www.iaea.org/
Arms Control Association
http://www.armscontrol.org/
United Nations Office for Disarmament Affairs (UNODA)
http://www.un.org/disarmament/
Center for Arms Control and Non-Proliferation
http://www.armscontrolcenter.org/
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