 If you saw someone climbing onto a roof that you hadn't authorized any clearance on, it's got a clear line of sight. It's exactly adjacent to the shooting where the president was sitting. And you're talking about a pop shot and you've got people yelling and there should have been comms. The minute that that local law enforcement who apparently had a rifle pointed on, there should have been an emergency frequent comms channel that they could have said, we have a shooter on the roof, shooter on the roof. Secret Service should have rushed the stage and immediately took the president and took him off and then responded to the counter sniper. The shot should not have gone off.