National Museum of Nuclear Science & History
Minnesota native Roger Hultgren worked for the DuPont Company as a chemist during the early 1940s, initally assigned to the Jolliet, Illinois munitions plans.
Stanley Stewart was the Contracting Officer at Los Alamos during the Manhattan Project. After the bombings of Hiroshima and Nagasaki, Stewart wrote, “The security restrictions on our part of the work [at Los Alamos] have been more rigid than than on any other portion of the entire Manhattan Project.
Lyman Brenneman was a member of the Special Engineer Detachment at Oak Ridge and was assigned to the K-25 Power Plant.
