National Museum of Nuclear Science & History
Major John A. Derry was a top military assistant, mainly working in Washington D.C., during the Manhattan Project.
Daniel J. Keefe was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Robert JS Brown was a member of the Special Engineer Detachment at Los Alamos. He worked under Don Hornig on the electrical aspects of detonation for the plutonium bomb.
