After 2001, Pakistan had a chance to develop into a more stable country. It had strong leverage with the United States, which needed help to defeat Al Qaeda and the Taliban in Afghanistan. Pakistan received billions of dollars in aid and the promise of billions more, which Washington has begun to suspend or cancel. But the army continues its double game — accepting money from the Americans while enabling the Afghan Taliban — and the politicians remain paralyzed. Soon, most American troops will be gone from Afghanistan. And Pakistan will find it harder to fend off its enemies, real and perceived.