Page last updated at 10:38 GMT, Friday, 29 July 2011 11:38 UK

In Steinbeck's footsteps: America's middle class underclass

In The Grapes of Wrath, John Steinbeck describes the harrowing journey of the Joad family - migrant workers forced to leave their farm during the Great Depression - a story still relevant to those facing the realities of America's current economic crisis, as Paul Mason found when he retraced their route.

Broadcast on Thursday 28 July 2011.

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