National Museum of Nuclear Science & History
Kopanski worked at the 200 East Area at Hanford during the Manhattan Project.
John Arnold joined the Manhattan Project in 1943 when the MED tasked his employer, the Kellogg Corporation, with developing a special barrier for the gaseous diffusion plant in Oak Ridge.
B. Roswell Russell worked at the Metallurgical Laboratory in Chicago during the Manhattan Project. He was one of seventy signers of the Szilard Petition.
Gawthrop worked at the 300 Area at Hanford during the Manhattan Project.
