National Museum of Nuclear Science & History
Paul McKim worked for the United States Engineer District Office.
Thomas T. Tijerina served in the 393rd Bombardment Squadron.
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.
McKinney worked in the 200 East Area at Hanford during the Manhattan Project.