How High Are Stakes for President Obama In Syria?

How High Are Stakes for President Obama In Syria?
Black columns of smoke rise from heavy shelling in the Jobar neighborhood, east of Damascus, Syria, Sunday, Aug. 25, 2013. (AP Photo/Hassan Ammar)
How high are the stakes for Obama in Syria? Brookings Institution Analyst Michael O'Hanlon says the president's credibility is on the line because of his past comments about crossing a red line. More from O'Hanlon and ABC News White House Correspondent Ann Compton.