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  • July 1, 1946 - In an arms race against itself, the United States begins nuclear weapons testing at Bikini Atoll in the Pacific, by initiating Operation Crossroads.
  • July 9, 1955 - The Russell-Einstein Manifesto is issued, which addresses the dangers of thermonuclear weapons.
  • July 16, 1945 - The Trinity test, a plutonium implosion device, takes place at 5:29:45 a.m. mountain war time at Alamogordo, New Mexico. It is the world’s first atomic detonation.
  • July 19, 2011 - The Japanese government sends warnings to its population of radioactive beef as the fallout from Fukushima Daiichi continues.
 
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