National Museum of Nuclear Science & History
M. O. Swanson worked for the United States Engineer District Office.
Cloyd Marvin had been drafted into the Army, interrupting his education at Haverford University, in 1943 and joined the Special Engineer Detachment as a technician third grade, later being assigned to Los Alamos National Labs in 1947.
Litchfield worked in the 100 F Area at Hanford during the Manhattan Project.
