National Museum of Nuclear Science & History
James R. Chapman was an engineer working for Stone & Webster when he was recruited to work on the Manhattan Project.
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.
Holman worked at the 300 Area at Hanford during the Manhattan Project.
R. V. Ward worked for the J.A. Jones Construction Company.
