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In the 70 years since the famed Roswell UFO crash, there is a long history of allegations involving alien phenomena and their supposed government cover-ups. This special takes a hard look at the most famous, and lesser known, UFO reports.

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s Plot to Silence Conspiracy Theories

UFO Conspiracies: The Hidden Truth [DVD] : Movies & TV

What we know from decades of UFO government investigations

Watch UFO Conspiracy: Hunt for the Truth Streaming Online

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UFO Conspiracies : The Hidden Truth charts the US government's involvement with UFO phenomenon from 1947 to the present day. Featuring rare classified

UFO Conspiracies: The Hidden Truth [DVD]

Online Conspiracy Theories: The WIRED Guide

UFO Conspiracy: Hunt for the Truth - Apple TV