President Obama and a policeman with wreath
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President Obama visits Ground Zero

US President Obama has visited Ground Zero in New York, almost 10 years after 9/11, to lay a wreath in honour of the 3,000 people who died there.

It comes four days after he announced the death of al-Qaeda leader Osama Bin Laden, who is thought to have masterminded the 2001 attacks.

Laura Trevelyan reports from New York.

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