National Museum of Nuclear Science & History
George I. Ray worked for the G.G. Ray Company.
Lewis W. McDuffie served in the 603rd Air Engineering Squadron.
Waldo F. Christy was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
John Klein was a member of the Special Engineering Detachment. He worked at the Metallurgical Lab at the University of Chicago and at Los Alamos.
