Syria Summit: Parties agree on Syria's territorial integrity

The presidents of Turkey, Russia and Iran have met in Ankara for a trilateral summit, where they've agreed to step up joint efforts for a lasting ceasefire in Syria. They've also agreed to advance the political process in the war-torn country and speed up the delivery of humanitarian aid. TRT World's Turkey Political Correspondent Hasan Abdullah reports. Subscribe: http://trt.world/subscribe Livestream: http://trt.world/ytlive Facebook: http://trt.world/facebook Twitter: http://trt.world/twitter Instagram: http://trt.world/instagram Visit our website: http://trt.world