National Museum of Nuclear Science & History
N. A. Powell worked for the Kellex Corporation at the K-25 Plant.
Sherman D. Kaplan was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Rufus Addison worked for the Edenfield Electric Company.
Ralph Berger was a research assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
