U. F. O. Three letters that produce a feeling of creeping unease in normally rational people – albeit for different reasons.
For some of us, nothing is more disturbing than the thought of unexplained objects in the sky. They may be turquoise lights that throb gently among the stars, causing you to stop and squint as you put out the rubbish. Or they may be sinister black projectiles that flash across your windscreen so fast that you nearly crash your car. Either way, there's something Out There and the Ministry of Defence needs to know about it. (Unless it already does, but isn't saying.)
http://ufos.nationalarchives.gov.uk/
http://www.telegraph.co.uk/news/newstop ... ident.html