National Museum of Nuclear Science & History
John Riddle was a research assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Andrew Welch was a janitor at the Chicago Met Lab during the Manhattan Project.
Ted C. Irwin served in the 393rd Bombardment Squadron.
J. R. Simpson worked for the Edenfield Electric Company.
Edna K. Marks was a junior biologist and technician in the Health Division at the University of Chicago Met Lab.