There are more slaves in the world today than at any other time in history. Find out who and where those slaves are, and whether anything can be done to end slavery once and for all. Also: a new school in Baghdad that teaches Iraqis to tell their stories through film. A math professor explains how he calculates whether baseball players are worth their high salaries. And on Please Explain: how kids play make believe. Guest host Julie Burstein sits in for Leonard today.

Tune in for our latest Political Projections on Tuesday, April 1st! We'll talk about political idealism in Hollywood. We're also hosting a special film screening on March 31st. Seating is limited to the first 100 people who RSVP, so don't wait!