National Museum of Nuclear Science & History
John W. Calkin graduated from Columbia University in 1933. He then earned a Ph.D. in mathematics from Harvard.
Marilyn Hanna was trained as a clerk typist, and worked for the Manhattan Project in Oak Ridge and later for the Security and Patent divisions in Washington, DC.
John R. Leary Jr. was an American chemical engineer. He worked as a Shift Supervisor at the X-10 Plant, and as a research chemist in Building 205, at Oak Ridge.
