The Last Word with Lawrence O'Donnell 08/27/13

Chemical weapons ‘undeniable’ in Syria

With Sec. of State John Kerry saying it was "undeniable" that chemical weapons were used in Syria, the Assad Regime in Syria has crossed President Obama's red line. MSNBC's Ari Melber discusses how the U.S. might respond with former Ambassador Marc ... more Duration: {{video.duration.momentjs}}