Add Yahoo as a preferred source to see more of our stories on Google. Former intelligence officer David Grusch said the US government was in possession of alien aircraft. (Getty) (Sipa US, Sipa US) ...

Aircraft was spotted by more than 50 people near USA military base but reports have been quashed, says Jeremy Corbell. The US government has so far successfully covered up a mass sighting of an "alien ...

Are aliens real? Is the government trying to cover them up? Learn how these popular alien conspiracy theories have become so fascinating. Every few years, an eerie cycle plays out in the news.