The 1976 Tehran UFO Incident was a radar and visual sighting of an unidentified flying object (UFO) over Tehran, the capital of Iran, during the early morning hours of September 19, 1976. The incident is particularly notable for the electromagnetic interference effects observed on aircraft in close proximity to the object: two F-4 Phantom II jet interceptors independently lost instrumentation and communications as they approached, only to have them restored upon withdrawal, and one of the aircr ...