The chilling reality, emphasized by this week’s tragedy in San Bernardino, is that mass shootings are on the rise in the U.S. So, what should you do if you’re caught in one? Experts in dealing with such “active shooter” crises differ in the details, but share a core piece of advice: Don’t freeze. React.  “We’ve got to teach the mind-set of, ‘Folks, this is real,” Greg Crane, president of ALICE Training Institute, said Thursday. “You need to understand that you’re the first responder.” “We don’t tell people to just sit down if there’s a fire. This kind of (active shooter) situation is no different.” Read more