National Museum of Nuclear Science & History
Duffer Crawford worked for the civilian contractor Kellex Coroporation in New York under the supervision of Judson Swearingen.
S. W. Pratt worked for Clinton Laboratories at the X-10 Reactor.
Louis Bernard Werner was an American chemist. Werner received a B.S. from the University of Idaho, and was working on his doctorate at the Univeristy of Chicago at Berkeley when he was recruited to work on the Manhattan Project at the Chicago Met Lab.
James Downey was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.