 But a single agent with a drone could have kept an eagle's eye on the entire area, with particular focus on the roof, whose slant initially concealed the gunman from a Secret Service counter-sniper team. All right, so there you go. Maybe the Secret Service drone folks had been at the NATO summit in New York at the end of last week and were in transit to the Republican convention in Milwaukee at the time of the rally. Are you kidding me? That's the excuse?