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  • July 1, 1968 - The Treaty on the Non-Proliferation of Nuclear Weapons (NPT) is signed at Washington, Moscow and London.
  • July 20, 1982 - President Ronald Reagan removes the United States from the ongoing Comprehensive Test Ban Treaty talks in Geneva. This action ends two decades of negotiations.
  • July 21, 1945 - President Truman approves order for atomic bombs to be used.
  • July 29, 1957 - The United Nations establishes the International Atomic Energy Agency (IAEA)to promote peaceful uses of nuclear energy.
 
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