National Museum of Nuclear Science & History
Mars worked for Stone and Webster Engineering Corporation.
Logan Emlet was the Director of the Operations Division at the X-10 reactor in Oak Ridge, TN during the Manhattan Project.
Douglas Meigs was a civilian chemical engineer working for H. K. Ferguson, the company that built and operated the S-50 Thermal Diffusion facility at Oak Ridge.
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.