Where would the left hook go? Sooner or later you have to face whatever is in Bagdad, or sit outside and lay siege and starve 'em out.
I heard some military guy on FOX saying that the plan is to surround the city but stop short of going into Bagdad, and then let Spec. Forces start cleaning out the pockets of resistance. Damn, I hope it works - but it will be nasty work.