Why?

How about because it would provoke even more anger from Pakistan for sending in US troops into

I mean look at what a few limited airstrikes did, they got mad at that--sending in special forces battalions across the border would raise a few eyebrows, and I doubt Pakistan would give it a green light.

Cooperation with the new Pakistani government is the best way to go, as hard as it is. They also didnt know Bin Laden was there for sure, we dont now. We have ideas, but thats all weve got. He could be anywhere in the world, hypothetically.

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"...Follow the crystal star to the pyre of the flame; there exists the dwelling of the spreading fire. The heart of this life rests upon the fate of that place, and what begins there sends a contagion to the rest of the universe.
As long as the fire burns we shall never be free..." (The Shadows of Yavara, Final Reclamation)