On August 6, 1945, Tsutomu Yamaguchi was getting ready to leave Hiroshima.

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He had been there on a business trip and was supposed to return home that day.

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Then he saw a flash in the sky.

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The United States had dropped an atomic bomb on Hiroshima.

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Yamaguchi was about three kilometers from the explosion.

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The blast threw him through the air.

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He suffered serious burns, his eardrums were damaged, and he spent the night in an air-raid shelter.

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The next day, injured and bandaged, he began the journey home.

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His home was in Nagasaki.

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He arrived on August 8.

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And somehow, the following morning, he went to work.

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Yamaguchi was telling his supervisor what had happened in Hiroshima.

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He was explaining that a single bomb had destroyed an entire city.

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His boss reportedly didn't believe him.

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Then, at 11:02 a.m., the room filled with another brilliant flash.

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A second atomic bomb had just exploded.

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Yamaguchi survived again.

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His wife and infant son also survived Nagasaki, although all three experienced health problems in the years that followed.

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Yamaguchi lived until 2010.

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He was 93.

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There were other people believed to have experienced both bombings, but in 2009, the Japanese government officially recognized Yamaguchi as a survivor of both Hiroshima and Nagasaki.

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He had gone to Hiroshima for a business trip.

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He came home.

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And history followed him there.