National Museum of Nuclear Science & History
Harlan Johnson worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Kopanski worked at the 200 East Area at Hanford during the Manhattan Project.
Jack Howard Smith was an American physicist. Smith was a Ph.D. student under Hans Bethe at Cornell University when Bethe was tapped by J.
Elwin Covey was an assistant and protégé to Glenn Seaborg, and spent most of his time with the Manhattan Project at the X-10 plant in Oak Ridge, Tennessee.
