 This is an epic failure by the US Secret Service. The advance team typically goes in seven to ten days before an event and they survey the area, they do the site assessment. And then they do a sweep of the area, typically 12 hours before the event. How they did not see this roof, which was within 130 yards of where the president would be standing is unacceptable. And you know what I want to hear, where is the head of the Secret Service?