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The UFO Documentary: The Day Before Disclosure was produced by Freedom of Information Act (mainly the government of the United States) which was about being aware that we are not the only the living organisms of the universe.
Spacing Out - 2012 Sirius UFO Documentary and the Atacama Humanoid 1-48 was released on: USA: 3 May 2013
Appearently the Columbus/UFO story is just that, a story. There is mention of a UFO in Columbus's log book.
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You would Need archers to shoot the ufo down
Carter's UFO The Truth Behind the Leary Lights - 2014 was released on: USA: 5 May 2014
There are tons of videos of UFOs out there. How real they are is a different story. Just search UFO videos.
Yes. Watch the documentary about them. It is called "Close Encounters of the Third Kind." It is about the very first sightings and visit.
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UFO stands for 'unidentified flying object' therefore of course they exist, it could be anything as its unidetified. It could be a balloon or plastic bag. Spaceships however, are a different story.
a UFO See http://grammar.ccc.commnet.edu/grammar/abbreviations.htm (all the way to the bottom) for help determining when to use a or an before an abbreviation.
Ufo's do exist because a Ufo is a thing in the sky that you can not explain.