National Museum of Nuclear Science & History
William Ladniak worked for Clinton Laboratories at the X-10 Reactor.
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.
Ralph Berger was a research assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.