National Museum of Nuclear Science & History
Winzenburg worked for Stone and Webster Engineering Corporation.
L. Mayer worked for the Watson-Flagg Engineering Company.
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.
Melvin Bengston was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.