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  • August 5, 1963 - The Treaty Banning Nuclear Weapon Tests in the Atmosphere, in Outer Space and Under Water, or the Partial Test Ban Treaty, is signed in Moscow.
  • August 6, 1945 - The world’s second atomic bomb, Little Boy, a gun-type uranium bomb, is detonated 1,900 feet above Hiroshima, Japan. It has a yield of approximately 15 kilotons TNT.
  • August 9, 1945 - At 11:02 a.m. the world’s third atomic bomb explosion devastates Nagasaki.
  • August 28, 2012 - Russia announces it has dumped an alarming number of decommissioned nuclear reactors and radioactive waste into the Kara Sea, north of Siberia in the Arctic Ocean. Among the waste is 17,000 containers of radioactive waste, 19 ships containing radioactive waste, 14 nuclear reactors, and the K-27 nuclear submarine with its two reactors loaded with nuclear fuel.
  • August 31, 1946 - Hiroshima by John Hersey is published in the New Yorker magazine. It takes up the entire issue, revealing the horrors of atomic war to the American public.
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