Last March, a band of horsemen journeyed through the province of Paktika, in Afghanistan, near the Pakistan border. Predator drones were circling the skies and American troops were sweeping through the mountains. The war had begun six months earlier, and by now the fighting had narrowed down to the ragged eastern edge of the country. Regional warlords had been bought off, the borders supposedly sealed. For twelve days, American and coalition forces had been bombing the nearby Shah-e-Kot Valley and systematically destroying the cave complexes in the Al Qaeda stronghold. And yet the horsemen were riding unhindered toward Pakistan. They...
