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Black Friday: US begins its key sales weekend

23 November 2012 Last updated at 21:32 GMT

US retailers have begun their "Black Friday" sales, reopening stores after the Thanksgiving holiday.

Black Friday is usually the busiest shopping day of the year, as the Thanksgiving weekend marks the start of the holiday shopping season.

A survey estimated that 147 million people would go shopping between Friday and Sunday, despite more shoppers going online.

Ben Thompson reports.