National Museum of Nuclear Science & History
Hart worked for Stone and Webster Engineering Corporation.
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.
Robert Leroy Platzman was a chemist at the University of Chicago Metallurgical Laboratory during World War II.
