National Museum of Nuclear Science & History
William Stroud was a staff worker at Los Alamos during the Manhattan Project.
Neil Bergen was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
E. L. Taliaferro worked for the Roane-Anderson Company.
Thomas Guilfoyle was a member of the Military Police at the University of Chicago's Metallurgical Lab from 1943 to 1945.