FILE - The financial center of Canary Wharf just outside the boundary of the City of London is seen through the Thames Barrier at night on Friday, Dec. 28, 2012. The low-lying city has long been vulnerable to flooding - particularly when powerful storms send seawater racing up the River Thames. But the 570-yard-long (half-a-kilometer-long) barrier, composed of 10 massive steel gates, each five stories high when raised against high water, has been in operation since 1982. (AP Photo/Alastair Grant, File)
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