So far we haven't been very good at predicting attacks. In the Orlando attack, there were warning signs, but they went nowhere. Maybe we need to tighten up how we respond to warning signs. But that's difficult, because in the United States we generally try to protect peoples' privacy and assume they are innocent until proven guilty, which are two things that have helped make America great. We want to be — and should be — the "good guys," even while dealing with bad guys.