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And again, the team on the roof behind Trump should NOT have been the team responsible for covering the roof the shooter was on, (the team on the water tower and the team on that very roof should have been covering that roof), but here's the best approximation I can get of the angle from the sniper detail's (and we're led to believe, the Secret Service's LONE) vantage point.
Surely these guys have thermal, so trees IRL would have been less of an obstruction than their opaque representation here