National Museum of Nuclear Science & History
N. B. Walsh worked for the United States Engineer District Office.
Olga Nelson was a staff worker at Los Alamos during the Manhattan Project.
Alvin R. Arnold served in the 1027th Air Material Squadron.
Paul D. Krause was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
O'Brien worked for Stone and Webster Engineering Corporation.
