National Museum of Nuclear Science & History
Frey worked in the United States Engineer District Office.
David Greenglass (1922-2014) was a machinist and member of the Special Engineer Detachment who engaged in espionage activities for the Soviet Union at Los Alamos during the Manhattan Project.
Kerr worked for Stone and Webster Engineering Corporation.
John Fancher worked for the Kellex Corporation at the K-25 Plant.
