National Museum of Nuclear Science & History
Fry worked in the United States Engineer District Office.
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.
J. F. Carpenter worked for the Tennessee Eastman Corporation at the Y-12 Plant.
