McDonnell Douglas MD-80On the night of 21 April 1991, the term 'close encounter' took on an altogether more significant meaning for the crew and passengers of a London-bound airliner.At 9.00 pm Captain Achille Zaghetti, who was piloting a McDonnell MD-80 aircraft, was amazed to see an unidentified flying object pass his aircraft as it flew over the coast of Kent at a height of more than 22,000 feet.As the UFO was no more than 1,000 feet above the airliner, and the incident therefore classed as a 'near-miss', an official inquiry was launched by the CAA.Approximately two weeks later the following brief statement was issued:"The pilot said the object was light brown, round, three meters long, and did not describe any means of propulsion, "The aircraft was under the control of London air traffic control center who had no other aircraft in the vicinity, but consistent with the pilot report, a faint radar trace was observed ten nautical miles behind the Alitalia aircraft."Extensive inquiries have failed to provide any indication of what the sighting may have been."Link - http://www.ufocasebook.com/zaghetti.htmlCaptain of Flight AZ 284 had Close EncounterHaving ruled out the possibility of it being a missile, weather balloon or space rocket, the MoD was forced to conclude that it was a genuine UFO and close the inquiry. The unexplained close encounter is one of many recounted in military UFO documents released today by the National Archives.The Alitalia aircraft was on a routine flight from Milan to Heathrow with 57 people on board when the ten-foot long object, which had no exhaust flame, was spotted by pilot Achille Zaghetti.He told accident investigators: 'I saw for about 3.4 seconds a flying object, very similar to a missile, light brown coloured.'At once I said, "Look out, look out" to my co-pilot, who saw what I had seen.'As soon as the object crossed us I asked the ACC (area control centre) operator if he saw something on his screen and he answered, "I see an unknown target 10nm ( nautical miles) behind you".'Link - http://www.dailymail.co.uk/sciencetech/article-1078970UFO files released October 2008 at The National Archives (UK)