Shocking UFO sighting above US Navy base in the California desert raises the possibility of alien visitors
These stunning pictures appear to show an alien spacecraft hovering in the air over the desert and have been seized upon by the UFO community.
They were taken by a man using the pseudonym "Keith Bradshaw", who says he went out to the desert near the Naval Air Weapons Station China Lake in California after being told about the craft by a friend.
He snapped the pictures in 2007 - but says he has been too nervous to show them until now.
He provided the pictures to 54-year-old UFO sleuth Philip Mantle, who says he hasn't seen anything like this in over 40 years of research.
Mr Mantle has described them as "the most controversial UFO photos on record" and adds experts are unable to agree if the photographs area
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