National Museum of Nuclear Science & History
Andrew Walker was a member of the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
Harry Petcher's flat feet meant he couldn't be drafted, but still had an obligation to work for the war effort.
Elvin Olsen was a staff worker at Los Alamos during the Manhattan Project.
D. R. Johnson worked for the Roane-Anderson Company.
