Anita Raghavan discusses the sensational collapse of the Galleon Group hedge fund from criminal charges of insider trading. Her book, The Billionaire’s Apprentice, focuses on Galleon’s founder, Raj Rajaratnam, who was one of the most prominent and successful investors on Wall Street until he was arrested in 2009 for insider trading crimes, and his apprentice and companion in crime, Rajat Gupta, the former head of McKinsey and Company. Anita is the London Bureau Chief for Forbes and contributor to New York Times Dealbook.