The Last Word with Lawrence O'Donnell 03/14/13

LaPierre attacks background checks at CPAC

The NRA's Wayne LaPierre railed against gun control legislation--specifically background checks--at CPAC on Friday. MSNBC's Alex Wagner talks to Dr. William Begg, the emergency room doctor who treated victims of the Sandy Hook shooting. Dr. Begg ... more Duration: {{video.duration.momentjs}}