Zone 51

SHORT UFO FACT: [The United States Air Force, which coined the term in 1952, initially defined UFOs as those objects which remain unidentified after scrutiny by expert investigators, though the term UFO is often used more generally to describe any sighting unidentifiable to the reporting observer(s). ]

1994 NELLIS SUPER SECRET UFO SIGHTING

SHORT UFO FACT: [Unidentified flying objects, or UFOs, are merely the popular term for any aerial phenomenon whose cause cannot be easily or immediately determined, says Wikipedia. Popular culture frequently takes the term UFO as a synonym for alien spacecraft. Some investigators now prefer to use the broader term Unidentified Aerial Phenomenon (OR UAP), to avoid the confusion and speculative associations that have become attached to UFOs. ]

UFO FOUND ON MARS

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Source: mystery-sky-lights.blogspot.com