National Museum of Nuclear Science & History
Robert Lyste Thornton was a Canadian-American physicist who oversaw the constuction and operation of the Beta calutron electromagnetic separation Plant in Oak Ridge, Tennessee during the Manhattan Project.
Alfred Pfanstiehl was a junior physicist at the Chicago Met Lab during the Manhattan Project. Pfanstiehl was a signatory of the Szilard Petition, an attempt to avert military use of the atomic bomb against Japan.
