Pope Francis called on Sunday for dialog and restraint two days after the killing of a top Iranian military commander by the United States. Speaking at the Sunday Angelus prayer at the Vatican, the pope did not mention Iran by name but spoke of a terrible air of tension that could now be felt in many parts of the world. 'I call on all sides to keep the flame of dialog and self-restraint alight and ward off the shadow of hostility,' he said. 'War only brings death and destruction.' On Friday a U.S. drone strike on a convoy at Baghdad airport killed Iranian military commander Qassem Soleimani, drawing promises of harsh revenge by Tehran.