Bonnie Raitt; Nico Muhly's Two Boys; Amy Tan's New Novel; the Birth of Twitter

Bonnie Raitt tells us about her career, launching her own label, and winning her tenth Grammy Award for her latest album, Slipstream. Composer Nico Muhly and singer Paul Appleby talk about the new opera Two Boys, which made its American debut at the Metropolitan Opera last month. Amy Tan on her latest novel, The Valley of Amazement. Nick Bilton of the New York Times discusses the launch of Twitter and how the site’s quick rise in popularity sowed the seeds for power struggles.