Breathing new life into the traditional civics lesson, Peter Sagal, host of NPR's "Wait, Wait ... Don't Tell Me," travels across the country on a Harley Davidson to find out where the U.S. Constitution lives, how it works and how it doesn't ... how it unites us as a nation and how it has nearly torn us apart. Sagal introduces some major constitutional debates today and talks with ordinary Americans and leading constitutional experts about what the Constitution actually says and what it means, the dramatic historical events and crises that have defined it, and why all this matters.