"The 1976 Tehran UFO Incident was a radar and visual sighting of an unidentified flying object (UFO) over Tehran"
"The incident is well-documented in an U.S. Defense Intelligence Agency (DIA) report with a distribution list that included the White House, Secretary of State, Joint Chiefs of Staff, National Security Agency (NSA), and Central Intelligence Agency (CIA). Various high-ranking Iranian military officers directly involved with the events have also gone on public record stating their belief that the object was not terrestrial"
Från History Channel:
http://www.youtube.com/watch?v=dlllJsK_bZc
