National Museum of Nuclear Science & History
Clarence Signaigo was a laboratory helper at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Olsen worked in the 200 East Area at Hanford during the Manhattan Project.
Earl Pond, Sr. worked for the J.A. Jones Construction Company.
Ralph B. Larsen was a machinist at Los Alamos during the Manhattan Project. His wife, Ruth Anderson, also worked at Los Alamos.
W. R. Perret worked for the Tennessee Eastman Corporation at the Y-12 Plant.