A UFO buzzed a nuclear bomber close to a key missile base in a chilling encounter which saw the object reportedly moving at incredible speeds of up to 3,900mph.
US military documents and witness testimony show the mysterious object performing "phenomenal" manoeuvres at incredible speeds as it was sighted by a crew aboard a B-52.
The UFO was first sighted by crews on the ground - before then being seen by the airmen, who received orders to investigate on the specific orders of a US Air Force General,
It appeared to hit speeds which were beyond any known aircraft at the time and was detected on the aircraft's radar scope.
Some members of the nuclear bomber crew made visual sightings of the object, describing it as a like a "miniature sun" and a "huge egg shaped object" that gave off a "dull reddish colour like molten steel".
And one airmen described the UFO has being oval shaped, red and with a silver "bumper-like" appendage as he spotted the object beneath the B-52.
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