National Museum of Nuclear Science & History
O'Brien worked for Stone and Webster Engineering Corporation.
James Franck (1882-1964) was a German physicist and winner of the 1925 Nobel Prize for Physics. During the Manhattan Project, Franck served as Director of the Chemistry Division of the University of Chicago’s Metallurgical Laboratory.
J. N. Trimble worked for the Tennessee Eastman Corporation at the Y-12 Plant.