National Museum of Nuclear Science & History
Daniel J. Keefe was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
F. Schmidt worked for the Tennessee Eastman Corporation at the Y-12 Plant.
James Jensen was a machinist at Hanford, Washington from September 1944 to the end of the war. Jensen's security clearance allowed him to machine parts and complete various tasks for the maintenance of the nuclear piles.
J. R. Simpson worked for the Edenfield Electric Company.
