National Museum of Nuclear Science & History
G. Hedrick worked for the Comstock-Bryant Electric Company.
Raphael Semmes worked for Clinton Laboratories at the X-10 Reactor.
Joseph Pappalardo was a staff worker at Los Alamos during the Manhattan Project.
Robert R. Williamson was a laboratory assistant and computer at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
