National Museum of Nuclear Science & History
Clarence Signaigo was a laboratory helper at the Metallurgical Laboratory in Chicago during the Manhattan Project.
C. C. Sperling worked for the Edenfield Electric Company.
R. G. Stacey worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Robert Webster was a member of the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.