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At what altitude did Little Boy explode over Hiroshima?
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atomic bombings of Hiroshima and Nagasaki
A gigantic mushroom cloud rising above Hiroshima, Japan, on August 6, 1945, after a U.S. aircraft dropped an atomic bomb on the city, immediately killing more than 70,000 people.
The atomic bomb known as Little Boy was airburst at an altitude of 580 meters (1,900 feet) above Hiroshima on August 6, 1945.12