National Museum of Nuclear Science & History
Paul Sperling was a staff worker at Los Alamos during the Manhattan Project.
Mortimer Schwartz served in the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
H. W. Oldfield worked for the Roane-Anderson Company.
Opaline Calhoun was a laboratory technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
