Could world governments have knowledge of intelligent extraterrestrial life that they have been hiding from the public? For decades, government officials have claimed nothing was recovered in Roswell, New Mexico other than a weather balloon, but in April of 2011, an FBI file revealed that J. Edgar Hoover was briefed on three “flying saucers” recovered in New Mexico. In 2013, after years of denying a secret base called Area 51, the U.S. government officially acknowledged its existence. In 2014, the U. S. Army declassified files from a top-secret mission to establish a military base on the moon. And KGB files are just now coming to light that reveal the former Soviet government took great interest in UFO sightings, even though they denied this for decades. ANCIENT ALIENS contributors share their insights on past and present UFO cover-ups.