Ken Burns believes if America didn't have national parks, the Grand Canyon would be lined with mansions and Yosemite would be a gated community. (05:30)
Paul Krugman apologizes for winning the Nobel Prize in Economics, and J.J. Abrams is sorry for making his hidden puzzle too difficult to solve. (04:33)
Stephen wants every Jewish member of the television academy to call and beg for forgiveness, which he will then deliver in the form of an acceptance speech. (05:28)