Have you ever wondered what would have happened on 9-11 if the weather had not been CAVU in both New York and DC? Maybe the terrorists had to wait until they were sure of VFR weather both places (and who knows what other places). Even had they been able to use GPS to navigate to downtown Manhattan, hitting those buildings would have been like threading a needle for an inexperienced jetliner pilot.
My suggestion to anyone flying commercial is to fly at night only. They can't find a damn thing and thus would be less likely to waste the flying missile by missing their target. The flight crews and radar controllers are always much nicer at night as well.
Ever hear an Arab pilot give a readback? It's incorrect after the third word and the ground controller doing the sequence just gives up and makes a special departure for them. It's pathetic.