Black Triangle Sighting in Texarkana, Texas on July 20th 2015 – Low plane like roar, lower flying very large long triangle shaped craft, 1 red square type light in center, 2 white lights near end corners

Walked outside to see what my husband was doing (he was checking on a stump he had been burning) and as soon as I walked out from under the carport I heard a low, but still loud roar or rumble maybe of a plane-like object and when I looked up I saw an extremely large, long/narrow triangular shaped craft about to go directly over us. I yelled for my husband to look up and asked him what it was we were looking at and he just stood there speechless with me as we watched it fly very slowly over us. It was lower than any plane flies over out here, but not just that close (not just abover the trees or anything). From my view, I saw one red blinking light in sort of a square shape right in the center and 2 white lights closer to the end corners that never blinked. I could vaguely make out detailed compartments or pieces of the underside as it was right above my head and it slowly made its way across the sky past my view due to trees. My husband had enough tome to run and grab his rifle with a scope and look thru it and see the object up closer than I did, and said at the front (cockpit I suppose?) was 3 windows or something that were lit up from the inside, and describes the rest just as I did. We were astounded, never seeing anything like this before, and cannot figure out what it could be. We are assuming just some sort of military plane, but can't help but think UFO. We hope to get some sort of info, explanation or others near who might have seen the same thing.