The following are the top 5 instances of government coverups regarding alien activity.

00:00 The Navy, Nuclear Weapons and UFOs
04:15 Inexplicable Flying Objects
08:41 US Government Sees More than We Know
12:34 Project Blue Book Attempts to Prove UFO Phenomenon
16:47 The Roswell Incident

Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule.

#AncientAliens

Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows:
http://histv.co/SubscribeHistoryYT

Find out more about the show and watch full episodes on our site:
https://histv.co/AncientAliens

Check out exclusive HISTORY content:
History Newsletter https://histv.co/newsletter
Website https://histv.co/History
Facebook https://histv.co/Facebook
Twitter https://histv.co/Twitter

"Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years.

HISTORY® is the leading destination for awardwinning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s alloriginal programming slate features a roster of hit series, premium documentaries, and scripted event programming.