Associated Press
A snow plough clears snow from Heathrow Airport, London  Friday Jan. 18, 2013. Heathrow Airport briefly shut a runway and cancelled dozens of flights as a snowstorm caused widespread travel disruption across Britain.  Heathrow’s northern runway re-opened Friday after being shut down briefly for de-icing and snow clearing. Some 180 flights were cancelled by midday. Rail traffic was disrupted and roads were forced to close amid plunging temperatures and icy conditions.   (AP Photo/Steve Parsons/PA) UNITED KINGDOM OUT

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