Quote: wrencat1873 "And therein lies the problem.
Any attacker who is "happy" to die for their cause (whatever that may be), is very difficult to defend against.
The Nice incident was impossible to defend.
...'"
It's even worse than that. There only ever was a Nice incident because the lunatic managed to perpetrate the act. But had he been barred from driving into the area, then nobody would ever know or even suspect that such an insignificant "stop" had prevented a massacre.