Milestones: Tuesday, August 29, 2023
SPY DELIVERED U.S. ATOMIC SECRETS — THE SOVIET UNION SUCCESSFULLY DENOTED its first atomic bomb, codenamed “First Lightning,” on Aug. 29, 1949, from a remote test in Kazakhstan. As preparation, Soviet scientists constructed an entire “city” of buildings, bridges and other civilian edifices near the test site. They also brought mammals — in what would now be considered extreme animal cruelty — in order to observe the effects of the bombing on life forms. The bomb’s explosion, at 20 kilotons, incinerated the animals and destroyed everything in its vicinity. Just days later, a U.S. spy plane detected evidence of radioactivity. President Harry S. Truman eventually told the American public that the Soviet Union now had the bomb.
An investigation of this test bombing led to the arrest of German-born physicist Klaus Fuchs, who had helped U.S. scientists build their atomic bombs but was really on the Soviet side. Fuchs had passed U.S. nuclear secrets with detailed and exact information about the United States’ atomic program.
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