Donald Trump’s pledge to release official files relating to UFOs has intrigued conspiracy theorists who suspect the US government has hidden evidence of alien activity on Earth.
The first widespread reports of UFOs in Nevada took place during 1947's "flying disc craze." Here's what Northern Nevadans claimed to see that summer.
Area 51, a classified US military testing site in Nevada, became synonymous with aliens due to Cold War secrecy, UFO sightings and decades of speculation.
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