National Museum of Nuclear Science & History
E. S. Ryan, Jr. worked for the Poe Piping & Heating 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.
Leo P. Hassen was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Ilse Perlman was a staff worker at Los Alamos during the Manhattan Project.
C. M. Cantrell worked for the Tennessee Eastman Corporation at the Y-12 Plant.
