The Last Word with Lawrence O'Donnell 04/22/13

Boston bomber firefight and gun control

The Watertown police chief says officers tackled Tamerlan Tsarnaev when his gun ran out of bullets. MSNBC's Lawrence O'Donnell discusses the Boston bombers and massacre control with MSNBC's E.J. Dionne and the Huffington Post's Ryan Grim. ... more Duration: {{video.duration.momentjs}}