Journalist Dan Baum was sent to New Orleans to cover Hurricane Katrina and ended up writing a book about the people and culture of "The Big Easy". The book has now been turned into a musical with the help of composer Paul Sanchez. They talk about the people, stories, and music of Nine Lives. Plus: the fight to copyright Mardi Gras costumes. And: We talk with New York Times pop critic Jon Pareles about Trent Reznor's win for Best Original Score at last night's Oscars.