John P. Bourre

W. B. England

W. B. England worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Thomas J. Barthlow

August “Gus” Knuth

August “Gus” Knuth was a millwright and carpenter who helped construct Chicago Pile-1. He was present on December 2, 1942 when the pile went critical in the first self-sustaining chain reaction in history.

W. A. Gracey

W. A. Gracey worked for the Roane-Anderson Company.