Support WBURSyrian Rebels Will Face ISIS, But The U.S. May Not Have Their BacksPlay03:55Download AudioDavid WelnaMarch 14, 2015 ShareFighters from the Free Syrian Army and the Kurdish People's Protection Units battle ISIS militants in Kobani, Syria, in November. U.S. officials haven't said whether they will defend the forces if they are attacked by Bashar al-Assad. (AP)
