National Museum of Nuclear Science & History
Mathis worked for Stone and Webster Engineering Corporation.
Evans worked in the United States Engineer District Office.
Thomas R. Williams was a laborer at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
Ray Smith is the historian at the Y-12 National Security Complex. His specific focus is the history of Oak Ridge, and he is intimately acquainted with the uranium enrichment processes undertaken at the Y-12, K-25, and S-50 plants during the Manhattan Project, and how the Fat Man and Little Boy bombs worked.
