National Museum of Nuclear Science & History
H. M. Nappen 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.
Gilbert Mathis was an electrical engineer at Los Alamos from 1943 to 1946. He was recruited for the Manhattan Project as a member of the US Army Signal Corps.
John Deal worked for the Kellex Corporation at the K-25 Plant.
