National Museum of Nuclear Science & History
Harry Reason was a janitor at the Metallurgical Laboratory in Chicago during the Manhattan Project.
John Henry Manley (1907-1990) was an American physicist. Manley worked on the Manhattan Project almost from its beginning, starting at the Metallurgical Lab at the University of Chicago.
G. W. Dorsey worked at the 200 West Area at Hanford during the Manhattan Project.