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Associated Press
U.S. golfer Dustin Johnson is silhouetted as he takes a swing in a posed picture for photographers as Olympic rings hang from Tower Bridge ahead of the 2012 Summer Olympics, Monday, July 23, 2012, in London.  Johnson and Spanish golfer Sergio Garcia took it in turns to hit golf balls at a floating golf hole on the River Thames to promote for a sportswear maker.  Golf is set to be included as an Olympic sport in the next games in 2016.  (AP Photo/Matt Dunham)

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