National Museum of Nuclear Science & History
B. D. Manchester worked for the Roane-Anderson Company.
Eloy Roybal was a staff worker at Los Alamos during the Manhattan Project.
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.
Clarke worked in the United States Engineer District Office.