Is The CIA Responsible For UFO Sightings, Or Is It All A Cover Up?| Rob Riggle: Global Investigator

Rob Riggle sits down with a former Area 51 employee who confirms that many ufo sightings were just the CIA testing top-secret aircraft. However, after calculating the force and speed of the UFOs movements from a leaked tape, it is very unlikely the machine could be piloted by a human. Subscribe to Discovery UK for more great clips: http://www.youtube.com/subscription_center?add_user=DiscoveryTV Follow Discovery UK on Twitter: http://www.twitter.com/DiscoveryUK