National Museum of Nuclear Science & History
Harold Katz worked for the Roane-Anderson Company.
Seymour Calvert served for 11 months in the Special Engineering Detachment at Los Alamos. He specialized as a chemical engineer, and carried out experiments with beryllium that were often dangerous.
Antonio Codatta, Jr. served in the 393rd Bombardment Squadron.
Calderwood worked at the 200 East Area at Hanford during the Manhattan Project.
