National Museum of Nuclear Science & History
Charles Crichfield worked as an elctrician in Oak Ridge, Tennessee from 1943 to September 1945. Crichfield's brother Paul and father P.
George Koval was an American chemical engineer and one of the most important Soviet spies of the 20th century.
Arthur Buck was a security guard for the Metallurgical Laboratory (“Met Lab”) at the University of Chicago during the Manhattan Project.
