National Museum of Nuclear Science & History
Copeland worked in the United States Engineer District Office.
Robert Ball was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Leroy Jackson was transferred into the Manhattan District, the branch of the United States Army Corps of Engineers tasked with overseeing the construction of critical Manhattan Project sites, shortly after its formation in 1942.
Hennie Schallis was a staff worker at Los Alamos during the Manhattan Project.
