SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Soviet RDS-2 atomic bomb test, 1951. Detonation of this atomic bomb test, also known as Joe 2, which took place on 24 September 1951 at the Semipalatinsk Test Site in what is now Kazakhstan. This test had a yield of 38 kilotons of TNT. A total of 456 Soviet nuclear tests were conducted at the Semipalatinsk site between 1949 and 1989. This test was the second atomic bomb developed by the USSR. It was detonated from the top of a 30-metre-tall tower, by a signal sent from a bomber flying overhead.
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