National Museum of Nuclear Science & History
Marle Velde worked for the Kellex Corporation at the K-25 Plant.
Robert McCoy worked for the United States Engineer District Office.
Mathias A. Klinger was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
James R. Chapman was an engineer working for Stone & Webster when he was recruited to work on the Manhattan Project.
