A UFO conspiracy theory is any one of many conspiracy theories which argue that evidence of the reality of unidentified flying objects is being suppressed by the governments They argue that Earth governments, especially the Government of the US are in communication or cooperation with extraterrestrials, despite public claims to the contrary
Elements may include the government's sinister operative from Men in Black, the military, Area 51, RAF Rudloe Manor or Porton Down, the crash site in Roswell, New Mexico, the Rendlesham Forest Incident, a political committee dubbed the "Majestic 12".
The contention that there is a widespread cover-up of UFO information is not limited to the general public or UFO research community. For example, a 1971 survey of Industrial Research/Development magazine found that 76% felt the government was not revealing all it knew about UFOs, 54% thought UFOs definitely or probably existed, and 32% thought they came from outer space.[5]
Notable persons to have publicly stated that UFO evidence is being suppressed include Senator Barry Goldwater, Admiral Lord Hill-Norton (former NATO head and chief of the British Defence Staff), Brigadier-General Arthur Exon (former commanding officer of Wright-Patterson AFB), Vice-Admiral Roscoe H. Hillenkoetter (first CIA director), astronauts Gordon Cooper and Edgar Mitchell, former Canadian Defence Minister Paul Hellyer, and the 1999 French COMETA report by various French generals and aerospace experts



