Saw tri-angle lights under dark body while driving west on I-90Driving West on I- 90 a friend of mine an I saw what appeared to be a very bright star decending tward the ground from about 10 or 15,000 feet to about 1500 feet above ground level as we drove tward it at about 90 MPH. By the time we were about a mile from the object we assumed it to be some sort of aircraft from Ellsworth AFB. We quickly changed our minds when the odject appeard to be Three lights aranged in a tri-angle, The lights looked like a very large street light except that there was a dark body behind the lights and it appeared to be hovering at about 1500 to 2000 feet, which Helocopter pilots dont like to do becouse they loose ground effect. So we drive untill we are undernieth the object at which point were really freaked out we roll the windows down to confirm that its not a helo/ Harrier/ JSF X-plane Ect. and no sound was heard besides road noise, my friend sits on the door and looks over the top of the truck at the object and i Look out my open window to confirm that its not a reflection or any thing else. At this point we are driving about 60 mph next to a commercial truck whose driver looks at me with this wild expression as we both look back at the object it moves slowly tward the north and then just kind of winks out of view. To this day it is the only thing like it that i have ever seen, wether it was something from Ellsworth or not I dont know, I just thought that I should let somebody know.((NUFORC Note: Witness indicates that the date of the event is approximate. PD))