The Last Word with Lawrence O'Donnell 09/23/13

Obama on gun violence: ‘We can't accept this’

President Obama spoke at the memorial for the victims of last week's Navy Yard shooting, and while remembering the victims he made sure to let the American people know that the struggle over gun control isn't over. MSNBC's Lawrence O'Donnell has more ... more Duration: {{video.duration.momentjs}}