National Museum of Nuclear Science & History
H. W. Caldwell worked for the Edenfield Electric Company.
William S. Biggers worked as a chemical engineer during the Manhattan Project. Biggers worked at the the Houdaille-Hershey Plant in Decatur, Illinois from April 1944 to December 1946.
E. R. Spangler worked for the Tennessee Eastman Corporation at the Y-12 Plant.
