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.
Attended the University of California.
R. M. Galbreath worked for the Tennessee Eastman Corporation at the Y-12 Plant.
A. R. McCallum worked for the United States Engineer District Office.
