National Museum of Nuclear Science & History
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.
Technical Sergeant Roderick F. Arnold (1917-1998) was a Flight Engineer assigned to the Bockscar’s original crew.
L. F. Preston worked for the United States Engineer District Office.
