Floyd J. Ritchie

Robert J. Valley

Robert J. Valley served as a technical sergeant in the 393rd Bombardment Squadron. He was the tail gunner 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.

Kenneth L. Cohn

Kenneth L. Cohn was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

H. H. Hart

John R. Caldwell

Caldwell worked in the United States Engineer District Office.