National Museum of Nuclear Science & History
Frank Fessenden worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Bruno A. Katlarz served in the 393rd Bombardment Squadron.
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.
Howard Gest worked for Clinton Laboratories at the X-10 Reactor. Gest was one of the scientists who signed Leo Szilard’s petition against the use of the atomic bomb.