Author Michael Lewis
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What's behind the Wall Street protests?

6 October 2011 Last updated at 21:55 BST

On the streets of New York and other major cities, protests are spreading against what demonstrators claim is corporate greed.

The Occupy Wall Street Movement is about to enter its third week and now people haverallied in Washington, DC, in the shadow of the US capitol.

Author Michael Lewis's latest book, Boomerang, takes readers to the countries at the centre of the crisis.