Oracle catamaran capsizing
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Oracle catamaran makes a big splash in San Francisco

15 June 2011 Last updated at 10:44 BST

Preparations for one of yachting's biggest racing events, the America's Cup, have been getting under way in San Francisco Bay.

For the crew of Oracle Racing, the winner of last year's event, it was meant to be the chance to show off their state-of-the-art craft.

But things did not go according to plan.