One of the largest UFO festivals in the U.S. is almost here as alien enthusiasts get ready to come together and celebrate in downtown McMinnville.

And when people are convinced that they know a secret, world-shaking truth, they are willing to wait a long time for vindication. This is another way in which UFO disclosure resembles the coming of the Messiah: Both are constantly running behind schedule.

Credit: Project Gravitaur If you're seeking the best UFO documentaries, we have done a deep-dive into aliens, UAP craft, whistleblowers and psy to dig up where watch UFO docs – from "S4: The Bob Lazar Story" to "The Age of Disclosure" and more.