National Museum of Nuclear Science & History
Donald Francis Mastick was an American chemist who worked at Los Alamos and on Tinian as part of Project Alberta.
Lew Kowarski was a Russian-born French physicist. He worked as part of the team that discovered that neutrons were emitted in the fission of uranium-235 in the 1930s, setting the groundwork for the use of nuclear chain reactions in the design of the atomic bomb.
