National Museum of Nuclear Science & History
R. F. Ridgeway worked for the Roane-Anderson Company.
Lomie F. Caho was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Leonard Reed was a janitor at the Metallurgical Laboratory in Chicago during the Manhattan Project.
C. C. Upshall worked for the Tennessee Eastman Corporation at the Y-12 Plant.
R. D. Arthur worked for Clinton Laboratories at the X-10 Reactor.
