Laurel, Montana.Driving home from school one day, I saw an odd craft flying stunningly low. It was just above the tree line. I turned off the radio so I could hear it, but no sound was coming from it. It was black and triangular, and had a bit of orange on it. Flying from the east, going west. It was flying slower than physically possible, I dont know how it stayed in the air. It couldnt have been going more than 30 mph, yet stayed airborne. It was daytime so I saw it very well, was about 50 ft in length, and only about 100 yards away from me. It disappeared behind the treeline, and shortly afterward 2 helicopters followed, also flying low but not quite as low as the craft. I want to know what it was because it was weird and awesome.