National Museum of Nuclear Science & History
A. E. Ballard worked for the Tennessee Eastman Corporation at the Y-12 Plant.
John C. Pfeiffer Jr. served in the 393rd Bombardment Squadron.
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.
Kathleen “Kay” (Gavin) Florin was a clerk in the chemistry division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
