National Museum of Nuclear Science & History
John Loy worked for Clinton Laboratories at the X-10 Reactor.
Clarke worked in the United States Engineer District Office.
August “Gus” Knuth was a millwright and carpenter who helped construct Chicago Pile-1. He was present on December 2, 1942 when the pile went critical in the first self-sustaining chain reaction in history.
Thomas Cowley was a Military Policeman assigned to Post Security at Los Alamos, New Mexico during the Manhattan Project.