 The attempted assassination of Donald Trump Saturday night represents a profound failure by the Secret Service. Important questions about the shooting remain unresolved. The biggest of which is how did a gunman manage to scale a roof close to where Trump was speaking in western Pennsylvania and have an unobstructed view of the former president with bystanders pointing out the gunman? We're joined now by Brian Boyd, intelligence analyst and former Green Beret. Brian, this was outside their perimeter?