As a World War II pilot flying B-17 bombers behind enemy lines in Europe, Irvin Poff never backed down in the face of danger. In 1944, while he was flying in formation with a squadron of 28 other Army Air Force planes, an engine on Poff’s plane failed five minutes before he was ordered to drop 6,000 pounds of explosives over an Austrian oil refinery. Knowing Nazi fighters liked to pick off solo flyers, he diverted full-throttle emergency power to his remaining three engines.