National Museum of Nuclear Science & History
J. R. McClellan worked for the Roane-Anderson Company.
S. T. Cantrill was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Nally worked at the 300 Area at Hanford during the Manhattan Project.
William R. Purnell (1886-1955) was a Rear Admiral in the US Navy and served as the Navy liaison on the Military Policy Committee for the Manhattan Project.