At this point, there are only 2 reasonable conclusions to draw.
#1 - It was gross incompetence, and should result in the entire chain of command of the USSS in this incident either resigning or being fired. Maybe even higher in the administration, with some possibility of jail time for key players.
#2 - It was a deliberate act allowed by the same people and should result in the same, plus executions for some, and jail time for others.
At least when they killed Kennedy they pretended that it wasn't them.
