National Museum of Nuclear Science & History
Manning worked for Stone and Webster Engineering Corporation.
Vaughn Stockwell served in the 603rd Engineering Squadron.
Barrett Castle worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Jack L. Callan was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
E. M. Pownall worked for the Edenfield Electric Company.
