 It has everything to do with the speed of the wind and the lack of training of that shooter to call the wind. And it's not a coincidence that bullet got blown the exact direction off course that the wind would have blew it. The exact amount, the speed of the wind would have blown it. That is not a coincidence. There's 50 million men in this country that could take a shot with that rifle and make a headshot from that short of a distance. Why that building wasn't sterilized?