 You know, at this point, it appears that this was one of those lone wolf attacks, which is the term that's often used by federal authorities when they're talking about these sort of things. And it's something that they've spent a lot of years now sort of warning about and saying that that's among their biggest concerns. How difficult are such attacks just to stop and get ahead of? Well, the reality here, John, as you said, we've been warned about stuff like this for years. The problem is,