.
If you’re figuring out Friend or Foe after the shooting starts, your Target is Dead.
Trump turned his head or he’d be Dead.
Excuses
Still, it puts a lot more weight on the folks who screwed up by not putting someone on the roof ahead of time, and not identifying the assassin as he walked from his van across a very large field to a ladder in an alcove that only someone who had placed it there before would have known the location of.
waterboard....
Bottom line is a failure by SS to secure the perimeter adequately for a potential long range sniper. They should have secured at least 1000 yards.