National Museum of Nuclear Science & History
Frances Watson was a staff worker at Los Alamos during the Manhattan Project.
J. C. Freer worked for the Roane-Anderson Company.
Richard Emanatian was with the military police detachment at Los Alamos during the war. He maintained secrecy through the rest of his life, and his family only found about his involvement long after his death.
John Draughon worked for Clinton Laboratories at the X-10 Reactor.