Re: Casus Belli? (casus belli: A cause justifying war; a ground of war.)
Our "esteemed" mod ravage doesn't like it when I say so, but IMO it's the muslims here in the US that will be affected the most in the event of another 9-11 style attack. Fear should never be underestimated as a motivator, and my guess is the even the left wingers will be screaming for the FBI and CIA to look into anything that related to muslim plots/cells here in the US. The post 9-11 patriot act will look tame in comparison.
I don't think an attack on Pakistan's NW fronteir w/out Musharaff's permission would be an option. Chances are he'd be pressured into a US led joint-operation.