National Museum of Nuclear Science & History
S. H. Barrett worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Arthur Levy was a member of the Special Engineering Detachment responsible for developing high explosive casting procedures for the Fat Man plutonium bomb at S-Site at Los Alamos.
Hayden Rector was a contract attorney for the U.S. Army Corps of Engineers at Hanford, WA during the Manhattan Project.