National Museum of Nuclear Science & History
Harry Reason was a janitor at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Hans von Halban (1908-1964) was an Austrian physicist. Being of Jewish descent, Halban left Austria in 1935 to avoid persecution by the Nazi regime.
Tom Scolman arrived in Los Alamos shortly after receiving his Ph.D. in physics from the University of Minnesota under renowned physicist Alfred Nier.
W. A. Collins worked for the Poe Piping & Heating Company.
J. R. Brand worked for Clinton Laboratories at the X-10 Reactor.