cities of Karbala and Najaf Monday, killing 10 pilgrims. Every several weeks, Iranian pilgrims are attacked in Iraq, presumably by Sunnis who think the pilgrims are part of an Iranian effort to take over Iraq. In Monday’s two attacks, as in most of the previous ones, the killers focused on the buses that bring Iranians to the holy sites. The Karbala bombing killed 10 people, four of whom were Iranian. The Najaf attack killed eight, including six Iranians.