National Museum of Nuclear Science & History
Manning worked for Stone and Webster Engineering Corporation.
R.J. Stepheson was a consultant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
C. A. Billings worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Minnesota native Roger Hultgren worked for the DuPont Company as a chemist during the early 1940s, initally assigned to the Jolliet, Illinois munitions plans.
