Tanks Rumbling North from Islamabad toward the Swat Valley, refugees fleeing in the opposite direction: from the TV footage, at least, it appears that the Pakistani military is finally taking the fight to the Taliban. It was probably no coincidence that the assault began as Pakistan's President Asif Ali Zardari arrived in Washington for a summit with Afghan President Hamid Karzai and President Barack Obama. Zardari brought a long wish list: he wants aid, military hardware and training.
The U.S. is still fighting two unfinished wars, in Afghanistan and Iraq, and trying to avoid another one, with Iran. But Pakistan--a country...