What was UFO sighting in Sri Lanka?
3 March 2011 Last updated at 09:50 GMT
Classified files released by the National Archives have revealed an RAF officer had a close encounter while on holiday in Sri Lanka.
The man took images of the UFO which were found in declassified papers held by the Ministry of Defence.
Dr David Clarke, author of The UFO Files and senior lecturer in journalism from Sheffield Hallam University, said more UFO sightings happen when Hollywood films are made about aliens.