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　　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 wi... (展开全部)