National Museum of Nuclear Science & History
Barr worked for Stone and Webster Engineering Corporation.
Robert E. Johnson was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
George L. Brabenec was a master sergeant in the 393rd Bombardment Squadron. He served as the flight engineer of the Necessary Evil, but flew in the Big Stink during the Nagasaki mission.
George F. Robinson served in the 393rd Bombardment Squadron.
