What is the “mission” in regards to Syria? Hagar Chemali talks U.S. policy on Syria

What is the “mission” in regards to Syria? Hagar Chemali talks U.S. policy on Syria MSNBC https://www.msnbc.com/david-gura/watch/what-is-the-mission-in-regards-to-syria-hagar-chemali-talks-u-s-policy-on-syria-1211399235530?v=raila& April 18, 2018