National Museum of Nuclear Science & History
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.
A. S. Hoke worked for the Roane-Anderson Company.
E. H. Halbrook worked for the J.A. Jones Construction Company.
