The Kecksburg UFO incident occurred on December 9, 1965, at Kecksburg, Pennsylvania, United States, when a fireball was reported by citizens of six U.S. states and Canada over Detroit, Michigan, and Windsor, Ontario. Astronomers said it was likely to have been a meteor bolide burning up in the atmosphere and descending at a steep angle. NASA released a statement in 2005 reporting that experts had examined fragments from the area and determined they were from a Soviet satellite, but that records of their findings were lost in 1987. NASA responded to court orders and Freedom of Information Act requests to search for the records. The incident gained wide notoriety in popular culture and ufology, with speculation ranging from extraterrestrial craft to debris from the Soviet space probe Kosmos 96, and is often called "Pennsylvania's Roswell".

James Edward Oberg is an American space journalist and historian, regarded as an expert on the Russian and Chinese space programs. He had a 22-year career as a space engineer in NASA specializing in orbital rendezvous. Oberg is an author of ten books and more than a thousand articles on space flight. He gave many explanations of UFO phenomena in the popular press. He is also a consultant in spaceflight operations and safety.