A test nuclear explosion codenamed "Baker", part of Operation Crossroads, at Bikini Atoll in theMarshall
Islands, on July 25, 1946. The 40 kiloton atomic bomb was detonated by the U.S. at a depth of 27 meters
below the ocean surface, 3.5 miles from the atoll. The purpose of the tests was to study the effects of
nuclear explosions on ships. 73 ships were gathered to the spot--both obsolete American and captured ships,
including the Japanese battleship Nagato.
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