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  • 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. Some 90,000 to 100,000 persons are killed immediately; about 145,000 persons would perish from the bombing by the end of 1945.
  • August 7, 1979 - Highly enriched Uranium is released from a secret nuclear-fuel plant near Erwin, Tennessee, and about a thousand people are contaminated with up to five times as much radiation as they would normally receive a year.
  • August 9, 1945 - At 9:44 a.m., Bockscar, a B-29 carrying Fat Man, the world’s third atomic bomb, arrives at its primary target, Kokura. The city is covered in haze and smoke from an American bombing raid on a nearby city. Bockscar turns to its secondary target Nagasaki. At 11:02 a.m. the world’s third atomic bomb explosion devastates Nagasaki.
  • August 18, 1999 - The Cassini probe, a plutonium-powered U.S. spacecraft, engages in a "slingshot maneuver," returning into Earth's orbit to increase its velocity on its way to Saturn.
  • August 29, 2007 - Six nuclear-armed missiles without any special guard are loaded onto a B52 bomber and transported from the Minot Air Force Base in North Dakota to the Barksdale Air Force Base in Louisiana. The weapons lacked special guard for more than thirty-six hours until the Air Force realized its mistake.
 
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