National Museum of Nuclear Science & History
Andrew Welch was a janitor at the Chicago Met Lab during the Manhattan Project.
William Kann was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Tyson Hamel worked for the Roane-Anderson Company.
Crowley worked in the United States Engineer District Office.
Sidney Williams was a janitor at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
