National Museum of Nuclear Science & History
H. Hoessly worked for the Roane-Anderson Company.
Carroll worked for Stone and Webster Engineering Corporation.
William Brilliant was a guard at the Metallurgical Laboratory in Chicago 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.