COLUMBUS, Ohio (AP) — Ohio University student Gabby Bacha knows how to react if there's an "active shooter" on campus — when to run or stack desks against a classroom door, even what to do if a weapon is wrestled away — thanks to a training program put on by the school's police department. Eight years after the Virginia Tech massacre prompted tighter campus security measures, some universities make active shooter training mandatory for incoming students, while others offer little guidance on what to do if there's a gunman on the loose, a review of more than 40 states by The Associated Press shows. The Oct.