National Museum of Nuclear Science & History
John Leahy worked for the United States Engineer District Office.
Anthony J. (“Tony”) Matz was a procurement officer at the University of Chicago Met Lab. He helped obtain, handle, and move many of the materials for Chicago Pile-1 and witnessed it going critical on December 2, 1942.
Roy Phillippi worked for the Tennessee Eastman Corporation at the Y-12 Plant.
William J. Collinson served as a 1st lieutenant in the 393rd Bombardment Squadron. He was the navigator regularly assigned to the B-29 Some Punkins.