National Museum of Nuclear Science & History
L. E. Combs worked for the Roane-Anderson Company.
Heffner worked at the 200 East Area at Hanford during the Manhattan Project.
Alfred Pfanstiehl was a junior physicist at the Chicago Met Lab during the Manhattan Project. Pfanstiehl was a signatory of the Szilard Petition, an attempt to avert military use of the atomic bomb against Japan.
