Low flying, extremely slow moving triangular craft sighted in rural Kansas.Around 10:20 pm on the night of 7/21/15, my friend and I were sitting on the back porch stargazing when we encountered a very slow, low-flying craft coming from the east. We live in a fairly close proximity to a National Guard bombing range so we've seen our fair share of strange planes and all manner of aircraft, but this was by far the most interesting and unique encounter we've had to date.The craft was triangular in shape, with a single white light on each corner and a blinking red light on the middle of the underside. What really struck us about the object is that it was flying incredibly low, much lower than other aircraft we've seen during military flyovers, and of course much, MUCH lower than any commercial airplanes that regularly fly overhead. The second striking feature was the speed at which the object was moving--it was easily the slowest moving craft to ever fly overhead (and that's really saying something in A10 and AC130 territory!) It took approximately ten minutes to completely disappear from our line of sight.The thing that seemed to differ from other reports that we've read since our encounter last night was the noise level. While others seem to describe similar encounters as quiet or silent, our craft was quite loud, emitting a low rumble that could be heard even after it was out of our sight.As an interesting side note, shortly after that experience, we saw on the local news that a Blackhawk helicopter was forced to make an emergency landing at a relatively local airport--connected? In any case, the craft is welcome to fly by any time it wants, it was a wonderful experience.