Four 'UFOs' have been shot down over North America and it's unclear at this stage whether the 'airborne objects' are of the Men in Black kind, or something a bit more ordinary.
The Pentagon recently announced that they were investigating 171 unexplained UFO sightings, and the government's efforts to document the mysterious objects has led to hundreds of incidents being looked into, senior military leaders have said.
But over the years amateur sleuths have tried to get to the bottom of the sightings, and there have been many shocking revelations in the past year alone.
