The Kecksburg UFO incident occurred on December 9, 1965 at Kecksburg, Pennsylvania, USA. A large, brilliant fireball was seen by thousands in at least six U.S. states and Ontario, Canada. It streaked over the Detroit, Michigan/Windsor, Ontario area, reportedly dropped hot metal debris over Michigan and northern Ohio starting some grass fires and caused sonic booms in Western Pennsylvania. It was generally assumed and reported by the press to be a meteor after authorities discounted other proposed explanations such as a plane crash, errant missile test, or reentering satellite debris