Awais Reza is a shopkeeper in Lahore's Anarkali Bazaar -- the largest open market in South Asia -- whose labyrinthine streets teem with shoppers, rickshaws, and cacophonous music. But Anarkali's exuberant hubbub cannot conceal the fact that Pakistan is a country at the edge of a precipice. In recent years, the easy sociability that had once made up this vibrant community has been replaced with doubt and fear. Old-timers like Awais, who inherited...