Langley AFB is an Air Force Base and also a CIA headquarters compound, so this would be a very likely (Intelligence) sighting that would not have been publicized.
They usually see UFO's at a UFO sighting
Yes.
James (Jimmy) Carter, who was the governor of Georgia at the time he reported the sighting.
On March 24, 2011, over Southhampton, England, a triangular, black UFO sighting in broad daylight.
The first actual UFO sighting was in 1500 B.C.!
Yes there has been a UFO sighting in Egypt.
yes
That was prior to written history so there is no record of the first sighting.
No UFO sighting was reported in AD 986...
No UFO sighting was reported in AD 963...
No UFO sighting was reported in AD 964...
No UFO sighting was reported in AD 965...