National Museum of Nuclear Science & History
Barksdale worked for Stone and Webster Engineering Corporation.
Campbell worked for Stone and Webster Engineering Corporation.
Jens Thornton, or “Jim” (as he went by at Berkeley) was an electrical engineer employed by Stone & Webster engineering firm during the Manhattan Project.
Stanley Krzyck was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
James Nolan was a captain in the Provisional Engineer Detachment at Los Alamos.