National Museum of Nuclear Science & History
Hayes worked in 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.
Leo Wojtanowski worked in a shop at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
