National Museum of Nuclear Science & History
Marle Velde worked for the Kellex Corporation at the K-25 Plant.
Mathias A. Klinger was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Melba Johnston worked for Clinton Laboratories at the X-10 Reactor.
Agnes Ryan was a staff worker at Los Alamos during the Manhattan Project.
