Strange black triangle moved close to our formationIn the early hours of desert storm around 02:46 hrs myself and three other aircraft (MH-60K Black Hawks) were inserting UW forces to take out a radar and scud site just inside the Iraq border with Kuwait.When our task force was about 2km out from the LZ we dawned are NVG'S as lead pilot on my aircraft I took control of the bird and started to prepare to land as I looked to my right to see the other two aircraft I looked at the blackhawk to my right and just above and to the front in the distance approx 3/4 at maybe 1,000 ft I saw what apeared to be a F-117 coming towards our formation, there were not to be any fighters in are AO at that time, the craft got within a 1/4 mile or so and slowed down to a speed which a stealth could not maintain and then turned to our north like a 90 degree turn the wing span was to long to be a F-117 the span was 70-80ft across no lights or any heat could be seen with the NVG's I heard the rear aircraft ask what was that aircraft doing so close to us and the the thing just vanished in the night! When we got back to base we never said anyting for very goog reason we did not want to be grounded and have to be debreifed for hours.I did check with fight ops and they said there no fixed wing aircraft at all with in 10 miles from us.So there you have it have fun