1956: AAA drops out of sanctioning racing after the 1955 Vukovich crash and public outcry that briefly followed, and the tragedy at Le Mans that same year, so USAC is formed to sanction Indianapolis style racing. Torrential rains flood the facility the week of the race and threaten to postpone, or outright cancel the race. Track superintendent Clarence Cagle pulls off what becomes known as "Cagle's miracle" and has the track cleaned up in time for race morning. Pat Flaherty wins.