By The Numbers: The atomic bombing of Hiroshima

By The Numbers: The atomic bombing of HiroshimaDoves fly over the cenotaph dedicated to the victims of the atomic bombing at the Hiroshima Peace Memorial Park during the ceremony to mark the 70th anniversary of the bombing in Hiroshima, western Japan Thursday, Aug. 6, 2015. (AP Photo/Eugene Hoshiko)

Thursday marked the 70th anniversary of the U.S. atomic bombing of Hiroshima on Aug. 6, 1945. A second atomic bomb was dropped on Nagasaki three days later. The U.S. has said the bombings hastened Japan’s surrender and eliminated the need for a U.S. invasion that would have cost many more lives. The toll on the two Japanese cities was heavy. Here’s a look, by the numbers, at that day 70 years ago:

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350,000: Population of Hiroshima before the bombing, of which 40,000 were military personnel.

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140,000: Estimated death toll, including those who died from radiation-related injuries and illness through Dec. 31, 1945.

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300,000: Total death toll to date, including those who have died from radiation-related cancers.

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1.2 million: Population of Hiroshima today.

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31,500: Height in feet (9,600 meters) from which the B-29 Enola Gay dropped the “Little Boy” bomb.

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2,000: Height in feet (600 meters) at which the bomb exploded 43 seconds after it was dropped.

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3,000-4,000: The estimated temperature in Celsius (5,400-7,200 Fahrenheit) at ground zero seconds after the detonation.

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8,900: Approximate weight of the “Little Boy” bomb in pounds (about 4 metric tons).

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1,600: Radius in feet (500 meters) from ground zero in which the entire population died that day.

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90: Percent of Hiroshima that was destroyed.

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45: Minutes after the 8:15 a.m. blast that a “black rain” of highly radioactive particles started falling.

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3-6: Weeks after the bombing during which most of the victims with severe radiation symptoms died.

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10 million: Origami (folded paper) cranes that decorate the Children’s Peace Monument in Hiroshima each year.

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Sources: Hiroshima city government; Japan Ministry of Health, Labor and Welfare; Japan Foreign Ministry.

Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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