National Museum of Nuclear Science & History
Sherman D. Kaplan was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
R. Warden worked for the Edenfield Electric Company.
George Kehl was a metallurgist and professor at Columbia University’s School of Mines. He worked at Los Alamos on the Manhattan Project.
E. S. Bettis worked for the Tennessee Eastman Corporation at the Y-12 Plant.