FILE - In this Thursday, Jan. 19, 2012 file photo security forces take part during in a combined British police and British Royal Marines security exercise for the London 2012 Olympic Games on the River Thames in London. Fighter jets thunder above the English countryside. Missiles stand ready. And Big Brother is watching like never before. The London Olympics are no ordinary games _and Britain is no ordinary host. Not since World War II have Britain and the United States teamed up for such a massive security operation on British soil, and not without reason. (AP Photo/Alastair Grant, File)
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