 The Secret Service goes around and tries to clear that space in advance. But something happened here, and we don't have the answers to what went wrong or if there was some kind of security lapse. I do want to bring in Pierre Thomas, who's also been following along, talking to law enforcement. Pierre, you know that you've been getting word from the Secret Service. They have briefed the president, President Biden, on this. They always do a perimeter scan of the area ahead of time. But a lot of questions about how this happened tonight.