National Museum of Nuclear Science & History
Sidney Williams was a janitor at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
Edwin Halbur served in the 1395th Military Police Company, Aviation.
Arthur J. DiTullio served in the 1027th Air Material Squadron.
Sonia Weiner Katz was a secretary in the Chemistry Division of the Chicago Met Lab during the Manhattan Project.