National Museum of Nuclear Science & History
Clarence Signaigo was a laboratory helper at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Alfred Zuk was a member of the Special Engineer Detachment assigned to the 509th Composite Group in Wendover, Utah from 1944 to 1945.
William Moore worked for the Roane-Anderson Company.
Calderwood worked at the 200 East Area at Hanford during the Manhattan Project.
