On Aug. 6, 1945, 24-year-old Jacob Beser was the radar specialist aboard the Enola Gay when it dropped the atomic bomb on Hiroshima.

Three days later, Beser was aboard the B-29 Bockscar when it dropped the bomb on Nagasaki.

He is the only person who served as a strike crew member on both missions.

Below him, Japanese marine engineer Tsutomu Yamaguchi endured the first bombing during a business trip to Hiroshima, then returned home to Nagasaki in time to receive the second.

He is the only person acknowledged by the Japanese government to have survived both bombings.