National Museum of Nuclear Science & History
Jack Hefner joined the Manhattan Project at Oak Ridge in 1943. Hefner was a reactor engineer and helped supervise the construction of the X-10 Graphite Reactor.
H. R. Grady worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Wilber A. Stevens was an army officer in charge of overseeing construction at Los Alamos. He helped choose the site where the Manhattan Project would test its first atomic bomb.
Attended Washington University.
