National Museum of Nuclear Science & History
D. C. Hull worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Arthur S. Opsahl served in the 603rd Air Engineering Squadron.
Calhoun worked at the 300 Area at Hanford during the Manhattan Project.
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.
