Ancient Aliens — Episode 3: Top Ten Alien Cover-Ups

You are watching the episode Top Ten Alien Cover-Ups Ancient Aliens is counting down the world's top ten alien cover-ups, from the famous Roswell Incident to a secret military base rumored to be housing ET technology to recently released UFO videos captured by cameras on Navy fighter jets. Has there been a massive cover-up regarding the truth about an extraterrestrial presence on Earth?