National Museum of Nuclear Science & History
MacDonald was a member of the Instrument Section at the University of Chicago’s Metallurgical Laboratory.
Smith worked for Stone and Webster Engineering Corporation.
Samuel Podgor was born to Russian-migrants in New York City. He served in the Special Engineer Detachment at Los Alamos, NM where he worked in the Theoretical Division under Klaus Fuchs.
James F. Schumar was a metallurgist. In 1940, he became Chief Metallurgist at Wolverine Tube Company.