National Museum of Nuclear Science & History
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.
Howard “Howie” Wilcox was an American physicist. He studied at the University of Minnesota and was a teaching fellow at Harvard when he was recruited to work on the Manhattan Project at Los Alamos.