John L. O’Gara

A. L. Caldwell

H. L. Roland

H. L. Roland worked for the Midwest Piping and Supply Company.

Robert C. McKenzie

McKenzie worked for Stone and Webster Engineering Corporation.

Julian Schwinger

Julian Schwinger (1918-1994) was an American theoretical physicist and the 1965 Nobel Prize winner. During the summer of 1943, Schwinger briefly worked on the development of the atomic bomb at the University of Chicago’s Metallurgical Laboratory.