National Museum of Nuclear Science & History
Sherman Winters was a janitor at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
A. L. Crawford worked for the J.A. Jones Construction Company.
Robert Ball was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Sheffield Gordon was an associate chemist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.