Anthony Cosimano

Patricia Lear

Patricia Lear was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Paul Hageman

R. W. Hamer

R. W. Hamer worked for the Roane-Anderson Company.

Henry Stimson

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.