National Museum of Nuclear Science & History
R. A. Smith worked for the H. K. Ferguson Company.
Judd Nevenzel was a staff worker at Los Alamos during the Manhattan Project.
Harry Daghlian (1921-1945) was an American physicist. He died in 1945 from radiation poisoning after a criticality accident at Los Alamos.
Otto Nillige was a carpenter at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.