National Museum of Nuclear Science & History
Raymond Hamilton worked in the explosives research area at Los Alamos after a distinguished career with the US Army Coast Artillery Corps 705th Machine Gun Battery.
Walter A. Ball served in the 1027th Air Material Squadron.
Roger Hildebrand is an American physicist and Manhattan Project veteran. He is the S.K. Allison Distinguished Service Professor, Emeritus, at the University of Chicago and is affiliated with the Enrico Fermi Institute.