National Museum of Nuclear Science & History
Frank Vaughan was a research associate at the Chicago Met Lab during the Manhattan Project.
Claude E. McLenon served as a technical sergeant in the 393rd Bombardment Squadron. He was a member of the ground crew regularly assigned to the B-29 Big Stink, and he and his crew were later reassigned to Luke the Spook.
Melville Heideman served in the 1st Ordnance Squadron.
Andrew Welch was a janitor at the Chicago Met Lab during the Manhattan Project.