National Museum of Nuclear Science & History
L. E. Johnston worked for the United States Engineer District Office.
N. W. Kemper 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.
Herbert E. Kubitschek (1920-1989) was an American biologist and physicist. He studied under Enrico Fermi at the University of Chicago and was present when Chicago Pile-1, the world’s first self-sustained nuclear chain reaction, went critical on December 2, 1942.
