> As far as I know the protection against "taking a jet and crashing it into a building" is a squadron of fighter jets that are quickly dispatched to (if necess

> As far as I know the protection against "taking a jet and crashing it into a building" is a squadron of fighter jets that are quickly dispatched to (if necessary) shoot down any plane on a risky path. It's 16 miles from JFK airport to Manhattan. A jet plane can fly this distance in less than 5 minutes at sea level, within a normal flight envelope. There's latency recognizing from the ground that an airliner needs to be intercepted, launching alert fighters, and getting authorization to shoot down. Trust is involved in allowing a big container to be loaded on a plane.