A vendor selling burial shrouds at his shop in Najaf, which is prospering from the never-ending flow of bodies brought for interment in the city Najaf, home to the golden-domed shrine of the Imam Ali, is Iraq’s holiest Shiite city and has long lived off a constant flow of pilgrims. Now, with Iraq engulfed in a vicious sectarian war, it also prospers from a never-ending flow of bodies brought for burial in one of the largest cemeteries in the world. Every day fleets of minibuses ferry Shiite corpses to Najaf and the massive Wadi al-Salam (Valley of Peace) cemetery, which...