Emmanuel Rogers speaks with Stephen J. Dubner. Along with Steven Leveitt, they make up the Freakonomics radio team. Their latest book - When to Rob a Bank and 131 More Warped Suggestions and Well-Intended Rants. Then it's Lillian Vasquez in conversation with Richard Sherman. We'll hear about how It's a Small World came about, Mary Poppins and Disney, and just what song - of all Richard and his brother wrote - what was his favorite? Or at least - the most significant?