National Museum of Nuclear Science & History
George Maronde was a security guard at the University of Chicago Metallurgical Lab. He stood guard outside Stagg Field when Chicago Pile-1 went critical on December 2, 1942.
Don Cowen worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Sheffield Gordon was an associate chemist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
