National Museum of Nuclear Science & History
J. D. Renfroe worked for Clinton Laboratories at the X-10 Reactor.
Harold Hoover was a member of the Special Engineer Detachment during the Manhattan Project. He worked as a filter foreman at the Y-12 Plant, but his real job was in counterintelligence, to ensure no sabotage occurred.
Goldring worked in the United States Engineer District Office.
