National Museum of Nuclear Science & History
Margaret M. Emmerson was a technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Marion R. Villarreal served in the 603rd Air Engineering Squadron.
Helen D. Thomson was in the Army Group at the Metallurgical Laboratory in Chicago during the Manhattan Project.
J. O. Donley worked at the 200 West Area at Hanford during the Manhattan Project.
