I read somewhere that the CIA-funded tunnel complexes at ToraBora could conceivably allow Bin to escape into Pakistan UNDERGROUND(!). But a look at the map changed my mind. ToraBora is about 100 miles from the border. That'd be one helluva tunnel, neh?
The Pakis helicopters are hovering at the border? It'd be neat to see the Pak counterpart of the door gunner from Full Metal Jacket yelling "Get Some! Get Some!" while spraying the escaping al Qaeda with .50 cal rounds....