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National Museum of Nuclear Science & History

Fred A. Hoey served as a 1st lieutenant in the 393rd Bombardment Squadron. He was the navigator of the B-29 Full House, which served as a weather reconnaissance plane on the Hiroshima bombing mission, and the backup strike plane on Iwo Jima on the Nagasaki mission.

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August “Gus” Knuth

Chicago, IL

August “Gus” Knuth was a millwright and carpenter who helped construct Chicago Pile-1. He was present on December 2, 1942 when the pile went critical in the first self-sustaining chain reaction in history.

Seymour L. Mintz

Los Alamos, NM

Ralph Brooks

Y-12 Plant

Ralph Brooks worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Anthony D. Capua, Jr.

Hiroshima Mission

Anthony D. Capua, Jr. served as a sergeant in the 393rd Bombardment Squadron. He was regularly assigned as an assistant engineer/scanner in the Up An’ Atom, but did not fly in that plane in the August 1945 bombing missions on Hiroshima and Nagasaki.