The United Nations Charter is signed in San Francisco.
“Trinity,” the first nuclear device, is exploded at Alamogordo, New Mexico. The test ushers in the atomic age.
August 6 and 9
Hiroshima and Nagasaki are bombed, killing and injuring hundreds of thousands of people.
Soviet Union detonates a nuclear device.
President Truman approves a program to build the hydrogen bomb.
Hydrogen-bomb test Bravo at the Bikini Atoll irradiates twenty-three-man crew of Japanese fishing vessel Lucky Dragon, eighty-five miles away. The explosion is equivalent to a thousand Hiroshima bombs. The event rouses dread around the world and helps launch a global campaign to end ...
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