Little Boy

atomic bomb, World War II

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In nuclear weapon: The weapons are used
…untested uranium-235 gun-assembly bomb, nicknamed Little Boy, was airburst 580 meters (1,900 feet) above the city to maximize destruction; it was later estimated to yield 15 kilotons. Two-thirds of the city area was destroyed. The population present at the time was estimated at 350,000; of these, 140,000 died by the…
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