Nov 12: Sir Martin Sorrell on the future of media

Part 4, November 12 2009: Sir Martin Sorrell, chief executive of WPP Group, talks to Chrystia Freeland, US managing editor, about Google's relationship with News Corporation, the need for media groups to charge for content and the search for new media models. He also discusses the potential deal between General Electric and Comcast for NBC. Next week, Robert Zoellick of the World Bank. If you have a question for Mr Zoellick, please email it to the link below.