In the late 1990's - early 2000's an extremely low flying black triangle was observed. the craft was low enough that i could make out distinct features in and on what i believe was the craft's propulsion system on the underside of the craft. centrally located, propulsion system had a distinct "blood orange" color to it. the craft was so low, and due to my positioning underneath the craft, i was able to observe ornate, ingot like internal structuring, surrounding the orange "plasma field". this craft was chased by a fighter jet for about 45 minutes to an hour, ending with the jet engaging the afterburners to keep up with the craft. this incident was mentioned in the local paper, attributing the actions of the pilot as a "prank" since the jet was flying so low, residents complained of the noise. there was no mention of what the jet was actually doing, which clearly was observing and tracking the unknown craft. this is just an overview of what transpired, i have more intimate details of the event not to be made public just yet.