National Museum of Nuclear Science & History
MacDonald was a member of the Instrument Section at the University of Chicago’s Metallurgical Laboratory.
Robert Serber (1909-1997) was an American physicist. He was recruited by J. Robert Oppenheimer to work on the Manhattan Project.
William J. Johnston served in the 1027th Air Material Squadron.
H. C. Young worked for the Tennessee Eastman Corporation at the Y-12 Plant.