The best hope for averting a bloodbath in the northwest Syrian province of Idlib — home to 2.6 million people and the last major bastion of rebels fighting the government — depends on cajoling tens of thousands of militants there to lay down their weapons.
That job falls to neighboring Turkey, which in an eleventh-hour deal last month brokered with Russia put on hold a Syrian government offensive to take back the province and end the long insurgency.