National Museum of Nuclear Science & History
Alfonso Tammaro worked for the United States Engineer District Office.
James S. Duva served as a 2nd lieutenant in the 393rd Bombardment Squadron. He was the navigator on the B-29 Jabit III on the Hiroshima mission.
Gebhardt worked for Stone and Webster Engineering Corporation.
George Maronde was a security guard at the University of Chicago Metallurgical Lab. He stood guard outside Stagg Field when Chicago Pile-1 went critical on December 2, 1942.
