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US Government covers up secret alien mining operation for decades? - National Park Mysteries

8:00

A series of incidents in Big Bend National Park leave experts convinced of secret alien activities taking place there. From the Grand Canyon to Florida's Everglades, the National Parks of the United States have been witness to an extraordinary series of strange events, apparent hauntings and legendary creatures. National Park Mysteries takes you beyond the ordinary into the virtually unexplored areas of North America’s national parks. Each episode presents several perplexing stories detailing unusual events at sites. From death cults to pre-historic monsters, there’s a surprise behind every remote corner.