 You know, you have to go through metal detectors. You can't bring bags in, or they have to be small, clear bags. You can control an inner perimeter a lot easier inside a building. And then we want to make sure that we take steps to protect the second layer, which is outside that inner perimeter. And that gets a little tricky when you're talking about an outside event, because the threat from an outside in an outside event is farther.