National Museum of Nuclear Science & History
Crawford worked in the United States Engineer District Office.
John Otto worked for Clinton Laboratories at the X-10 Reactor.
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.
