National Museum of Nuclear Science & History
Jas Major worked for the Kellex Corporation at the K-25 Plant.
John Leahy worked for the United States Engineer District Office.
Shad Marshall worked at Los Alamos on the Manhattan Project. He was married to Natalie Marshall, who also worked on the project.
James C. Hart was a DuPont chemist and member of the health physics group during the Manhattan Project.