National Museum of Nuclear Science & History
Leo Safranski was a research associate at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Sampson Powers worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Johnie Zaring was a staff worker at Los Alamos during the Manhattan project.
C. E. Twigg worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Arthur L. Hughes was an British/Welsh physicist. He worked on the Manhattan Project in St. Louis on the cyclotron and plutonium production and at Los Alamos, NM.