The Islamic State is mostly gone from the ancient city of Mosul after what some veterans call "the toughest urban warfare since World War II." Iraq's Prime Minister Haider al-Abadi has declared victory, but half his second largest city is in ruins. Thousands are dead; more than 700,000 are refugees. Nobody thinks peace is at hand — while ISIS still holds the Syrian city of Raqqa and fosters violence in other places, too. Will the US and other western countries help rebuild Mosul — while Kurds, Turks and other factions struggle for power?