National Museum of Nuclear Science & History
Joseph Ryan was a staff worker at Los Alamos during the Manhattan Project.
L. E. Dunkelberger worked at the 200 West Area at Hanford during the Manhattan Project.
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.
W. S. Herron worked for the Tennessee Eastman Corporation at the Y-12 Plant.
