National Museum of Nuclear Science & History
M. E. Ritchie served in the 390th Air Service Group.
Eleanor Ewing Ehrlich (1918-2011) was an American mathematician. During the Manhattan Project, Ewing worked at Los Alamos and helped run the IBM calculating team.
Robert Martens was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Charles Swenson worked in the shop at the Metallurgical Laboratory in Chicago during the Manhattan Project.