Ken Burns on what it means to be American as nation turns 250

Host Tim Boyum travels to New Hampshire to talk to documentary filmmaker Ken Burns about America turning 250 years old for this week's episode of Tying it Together. Burns talks about his latest documentary on the American Revolution, what the founding documents mean to today's America, and what he thinks it means to be an American. He tells Tim which historical figures he would most want to sit down with for dinner and what Mount Rushmore might look like if we chose again.