Newsnight - 21/07/2009

In-depth investigation and analysis of the stories behind the day's headlines, with Kirsty Wark. Award-winning journalist Sorious Samura, who was brought up in a polygamous family in Sierra Leone, reports on families with multiple wives in Britain's Muslim community. Also, as Federal Reserve Chairman Ben Bernanke seeks to reassure Congress and Wall Street over the state of the US economy, the programme asks if Washington's extraordinary economic stimulus is working.