National Museum of Nuclear Science & History
MacDonald was a member of the Instrument Section at the University of Chicago’s Metallurgical Laboratory.
Frank J. Feally served in the 1st Ordnance Squadron.
H. R. Chapman worked for the H. K. Ferguson Company.
Arthur Watmough was an electrical engineer working for the DuPont Chamberworks Company in New Jersey from 1941 to 1947.