US Air Force Tasked to Investigate Objects

US Air Force Tasked to Investigate Objects
Project Sign was the first official US government study of UFO phenomenon.

Project Sign (Project Saucer) was an official U.S. government study of unidentified flying objects (UFOs) undertaken by the United States Air Force (USAF) and active for most of 1948. It was the precursor to Project Grudge.

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