National Museum of Nuclear Science & History
Melvin Bengston was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
John Black worked for the J.A. Jones Construction Company.
T. C. Parham worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Raymond Hamilton worked in the explosives research area at Los Alamos after a distinguished career with the US Army Coast Artillery Corps 705th Machine Gun Battery.