National Museum of Nuclear Science & History
R. G. Mansfield worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Marie Sperling was a staff worker at Los Alamos during the Manhattan Project.
Calvin G. Siegle served in the 1027th Air Material Squadron.
Duane Sewell began working with the Manhattan Project in 1941. He was one of the first people to arrive at Oak Ridge and experienced first-hand some of the difficulties there with cyclotrons and isotope separation.
