It turns out that, despite what critics thing, it is very easy to create a missile defense system that will target and destroy ICMBs. All you need to do is put make sure all of the incoming missiles are equipped with GPS beacons, much like the Pentagon did for it much-publicized “successful” test in mid-July.
But, then why stop there? Why not save $100 billion and simply ask any rogue nations out there to please give us a 72 hour notice before launching any surprise nuclear attack?