National Museum of Nuclear Science & History
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.
R. S. Amrien worked for the Union Carbide & Carbon Corporation.
Pettengill served in the 393rd Bombardment Squadron.
Paul Tinsley worked for the H. K. Ferguson Company.
