National Museum of Nuclear Science & History
Lee W. Trybell worked in the shop at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Robert H. Shumard served as a sergeant in the 393rd Bombardment Squadron. He worked as an assistant engineer, aiding the other crew engineers with keeping the planes running during bombing missions.
Walter Youngs, Jr. worked for the United States Engineer District Office.
Daniel Pfaff was a staff worker at Los Alamos during the Manhattan Project.
