As the gateway to the fabled land of Hind, Afghanistan is one of the bloodiest places in history. Along the trail from Herat to the Khyber Pass lie the bones of a myriad adventurers, missionaries, traders, would-be conquerors and the people who lived there. The list includes Persians, Greeks, Turks, Arabs, Huns, Uzbeks, Chin and a hundred other groups searching for the Land of Five Rivers. The one constant is that few thought of founding a kingdom or dynasty in Afghanistan. Maybe they knew