The Freedom of Information Act allowed civilian UFOlogists to access information the government had kept under wraps. But after the millennium, the U.S. government itself decided to get back into the game — and discover once and for all where UFOs come from.

For more episodes like this one, follow Unexplained Mysteries. Every Tuesday and Thursday, unravel the stories behind history’s most compelling puzzles.

Learn more about your ad choices. Visit podcastchoices.com/adchoices