National Museum of Nuclear Science & History
Walter Johnson worked for the United States Engineer District Office.
Philip Morrison (1915-2005) was an American physicist. Morrison studied under J. Robert Oppenheimer at the University of California, Berkeley, and received his Ph.
David L. Hill was an associate experimental physicist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Hans von Halban (1908-1964) was an Austrian born French physicist. He finished his studies in 1934. He joined nuclear physicist Niels Bohr in Copenhagen, where he and Otto Frisch discovered that heavy water had very little neutron absorption compared to normal water.