National Museum of Nuclear Science & History
Helen D. Thomson was in the Army Group at the Metallurgical Laboratory in Chicago during the Manhattan Project.
J. E. Mason worked for the Roane-Anderson Company.
As Secretary of War under Presidents Franklin D. Roosevelt and Harry Truman, Henry L. Stimson (1867-1950) oversaw the entire Manhattan Project, and was responsible for appointing key project leaders and authorizing project construction sites across the US.
Tom Mulcahey was a staff worker at Los Alamos during the Manhattan Project.
