National Museum of Nuclear Science & History
Joseph Hirschfelder was an American physicist. He held doctorates in physics and chemistry from Princeton University.
Elizabeth Sands was a staff worker at Los Alamos during the Manhattan Project. She was married to physicist Matthew Sands.
Mark Fred was a research assistant in the chemistry division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
B. Roswell Russell worked at the Metallurgical Laboratory in Chicago during the Manhattan Project. He was one of seventy signers of the Szilard Petition.
