Summary: The fate of the last remaining humanitarian aid route between Turkey and rebel-controlled northwest Syria hangs in the balance as a decision on keeping it open comes up for a vote at the UN Security Council. Moscow could veto the extension, and that would mean more than 4 million Syrians could lose access to humanitarian aid. Nick Schifrin reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
