National Museum of Nuclear Science & History
Philip Vincent was a research associate at the Chicago Met Lab during the Manhattan Project.
Marshall Holloway was an American physicist. He received his PhD in physics from Cornell University. In 1942, he directed a secret Manhattan Project assignment at Purdue University.
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.