Keeping up with the news of the day can be tough. But for 26 years, Peter Sagal has been making it fun for audiences across the country as host of NPR’s weekly radio show “Wait Wait...Don't Tell Me!” This week, he’s offering fans a look behind the curtain.

You may know him as the funny and irreverent host of NPR’s “Wait, Wait … Don’t Tell Me!” But did you know Peter Sagal is also an avid runner? We get the rundown on “The Incomplete Book of Running.”

NPR's Peter Sagal joins us to discuss his new PBS series about the U.S. Constitution.