James I. Pegram

D. W. Clark

Opaline Calhoun

Opaline Calhoun was a laboratory technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

V. C. Kelsey

V. C. Kelsey worked for the Roane-Anderson Company.

Ernest O. Lawrence

Ernest O. Lawrence (1901-1958) was an American scientist and 1939 recipient of the Nobel Prize in Physics for his invention of the cyclotron.