Mark Bittman drops by to talk about what's changed—and what hasn't—in the year since his book Food Matters, was published. Also chefs Jorge Collazo and Bill Telepan discuss their efforts to create fresher, healthier meals in New York City Public Schools. Plus, Joshua Ferris talks about his latest novel, The Unnamed. And poet and performer Patti Smith discusses her friendship with Robert Mapplethorpe in the late 1960s and 1970s.