National Museum of Nuclear Science & History
J. R. Smith worked for the Roane-Anderson Company.
James Runyan 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.
Michael Cefola was an American chemist and a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.