National Museum of Nuclear Science & History
Ellsworth Risley was a staff worker at Los Alamos during the Manhattan Project.
Norene Mann was a secretary at the University of Chicago Met Lab. She worked for Nobel laureate James Franck, but often also acted as a secretary for Leo Szilard.
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.
Harriet Peterson was a nurse at Los Alamos during the Manhattan Project.
