MSNBC Live with Thomas Roberts 09/04/13

World leaders split over how to respond to the crisis in Syria

Despite a stern warning from President Vladimir Putin over U.S. action in Syria, the Russian leader said he's not ruling out support of such action if he can get concrete proof that the Assad regime carried out an alleged chemical attack. Ret. Gen. Barry McCaffrey and fmr. Amb. Chris Hill discuss. ... more Duration: {{video.duration.momentjs}}