Eight years after the Virginia Tech massacre led to tighter security at colleges across the U.S., some schools make "active shooter" training mandatory for incoming students, while others offer little more than brief online guidance on what to do if there's a gunman on the loose, a review by The Associated Press finds. The AP looked at public colleges and universities in more than 40 states after yet another shooting rampage, the killing of nine people at an Oregon community college Oct. 1. On Friday, there was more bloodshed, with one person killed and three wounded at an Arizona university.