National Museum of Nuclear Science & History
H. M. Nappen worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Natalie Marshall worked at Los Alamos on the Manhattan Project. She was married to Shad Marshall, who also worked on the project.
Schneider worked at the 300 Area at Hanford during the Manhattan Project.
Graf worked at the 300 Area at Hanford during the Manhattan Project.