National Museum of Nuclear Science & History
M. E. Ritchie served in the 390th Air Service Group.
Angell worked at the 100 F Area at Hanford during the Manhattan Project.
Arthur N. Jaffey was an associate chemist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Alfred Simon was a research associate at the Metallurgical Laboratory in Chicago during the Manhattan Project.