The Pentagon released over 1,500 pages of previously classified documents related to its unidentified flying objects (UFO) program. Leading UFO expert, Nick Pope, weighs in. Subscribe to KTVU's YouTube channel: https://www.youtube.com/channel/UCVhtkN7-c8mA8GXEoxS4YQw?sub_confirmation=1 KTVU ...

We sat down with your favorite celebs and asked them to explain one thing - are aliens real? From John Cena to Penn Badgley, these celebrities weigh in on whether they believe in the extraterrestrial. Watch more Esquire 'Explain This' episodes HERE: ...