National Museum of Nuclear Science & History
J. C. Freer worked for the Roane-Anderson Company.
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.
Winfield Sylvester was a staff worker at Los Alamos during the Manhattan Project.
