National Museum of Nuclear Science & History
O'Brien worked for Stone and Webster Engineering Corporation.
Donald Todd was a staff worker at Los Alamos during the Manhattan Project.
James Osborne served in the 1395th Military Police Company, Aviation.
Earl Rau served in the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
Jack L. Callan was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
