National Museum of Nuclear Science & History
James Forde joined the Manhattan Project in 1944 when he was hired by the Union Carbide and Carbon Company to work at the Nash Garage Building at Columbia University, where scientists worked on developing the gaseous diffusion process.
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.
Hilgeman worked at the 100-D Area at Hanford during the Manhattan Project.