Yes I imagine some heads will roll in the secret service for even allowing this type of thing to occur. Trump is lucky I think only because the guy was a bad shot. It is unthinkable to me that a guy can be seen crawling with a rifle up to the roof for 4 minutes and they never took Trump immediately off the stage. Them waiting for him to shoot first tells me that they were confused and maybe thought he was part of their team, but they still should have took Trump off the stage at the very moment they were aware of him on the roof, at least until they could figure out who it was or what was going on