National Museum of Nuclear Science & History
A. F. Tyra worked for the Union Carbide & Carbon Corporation.
Fred Hughes was a Reactor Operator at the Hanford B Reactor from 1943 through the end of the war. He worked for the DuPont Company, who transferred him from Prior, Oklahoma to Hanford in 1943.
Smith worked at the 200 East Area at Hanford during the Manhattan Project.
Robert Ball was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.