National Museum of Nuclear Science & History
George Riggenbach was a staff worker at Los Alamos 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.
J. T. Calvert worked for the Union Carbide & Carbon Corporation.
N. J. Zammarrelli served in the 390th Air Service Group.