National Museum of Nuclear Science & History
O'Brien worked for Stone and Webster Engineering Corporation.
Elizabeth Greisen accompanied her husband, physicist Kenneth Greisen, to Los Alamos during the Manhattan Project.
Arthur C. Stein served in the 320th Troop Carrier Squadron.
Armine E. Kohn served in the 320th Troop Carrier Squadron.
Charles W. Hagen was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
