National Museum of Nuclear Science & History
Mark Fred was a research assistant in the chemistry division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Wuethrich worked for Stone and Webster Engineering Corporation.
Cordell W. Callahan served in the 1st Ordnance Squadron.
Bruno Yurgaites was a janitor at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
