Calls Grow For U.S. To Intervene In Syrian Conflict

Secretary of State Hillary Clinton visited Istanbul this weekend to talk with Turkish officials about a post-Bashar Assad future for Syria. Clinton says it's urgent to plan for a transition and make sure Syria's institutions remain intact. She's also warning against a sectarian war. But some Syrian exiles say the U.S. has done too little, too late and its messages won't be heard as the warring factions become more radicalized.