National Museum of Nuclear Science & History
Jose Romero was a staff worker at Los Alamos during the Manhattan Project.
G. C. Kreis worked for the J.A. Jones Construction Company.
Herbert G. “Mac” MacPherson (1911-1993) was an American nuclear engineer. MacPherson’s expertise on graphite made him a valuable consultant for 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.
