National Museum of Nuclear Science & History
MacDonald was a member of the Instrument Section at the University of Chicago’s Metallurgical Laboratory.
Thomas C. Matson served in the 393rd Bombardment Squadron.
Blackstone worked in the United States Engineer District Office.
Roland E. Ryder served in the 603rd Air Engineering Squadron.
F. F. Brown worked for the Tennessee Eastman Corporation at the Y-12 Plant.