I was sitting in my 4th floor apartment living room, watching television when the sound of a heavy, large helicopter was approaching from the south. Usually this wouldn't have gotten my attention but the sound was approaching very slowly and when it sounded as if the Helicopter was virtually about to hover over the apartment complex, I got up and looked out my west facing living room window. I observed what appeared and sounded like a military style and the helicopter was following, very slowly following, an object that was a long, narrow triangular shape and moving at the same rate of speed. I observed this until I couldn't see it in my viewpoint thru the window any longer (about 10-15 secs). I could still hear the helicopter moving northeasterly after it was out of my sight. The triangle object was much greater in size than the helicopter (6-8 times the size of the 'copter, possibly more). The "object" was dark in color (as was the helicopter), had 2 glowing greyish/white lights in the rear and 1 light towards the front of the same color. Not beaming or flood type lights, just glowing. In fact they glowed enough that it illuminated the underside of the "object" so that I could tell that "it" was triangular shaped (not just that the lights were placed in triangular positions). It was also illuminated enough that I could see that the "object" had height and width. The "object" was dull blackish/gray color, similar to a black primer color. The helicopter had flashing lights on it as one would expect it to have. Only difference being that I couldn't distinguish any markings on it, being it was also dark in color.