Roller Derby was wildly popular for decades, but almost disappeared in the 1970's. Now it's back and has gained a die-hard following. We'll look at its growing popularity with Lisa Edwards and Kimberly Hendricks, members of the Old Capitol City Roller Girls from Iowa City. Later, a conversation with award-winning author and commentator Frank Deford. He'll talk about his autobiography out this week, Over Time: My Life as a Sportswriter. Deford speaks in Des Moines this week at an event sponsored by the Iowa Legal Aid Foundation.