National Museum of Nuclear Science & History
Robert Ball was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Melba Johnston worked for Clinton Laboratories at the X-10 Reactor.
P. S. Wilcox worked for the Tennessee Eastman Corporation at the Y-12 Plant.
John Nomerding was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.