In 1994 an encounter occurred at the Nellis Air Force Base with an unidentified flying object. A copy of the footage was smuggled out, and the program "Sightings" aired the footage with some commentary in 1997.
The images were shot on a range that is in restricted air space near Nellis AFB. The tracking cameras got a radar lock on an object that was traveling away from the camera initially, then abruptly changed course when the object detected that it was being tracked. The object appeared to be curious about what was tracking it and came in for a better view. This video was enhanced and viewed by several photo imaging experts, on camera , and they seemed to be baffled about it`s origin and properties.
The following are excerpts (See my comment below) from the conversation of the contractor`s personnel operating the tracking stations. Being good military folks, they do the best they can, which is to simulate an attack and kill the object.