A London Underground train arrives at a station in south London, during snowfall, Sunday, Jan. 20, 2013. (AP Photo/Lefteris Pitarakis)

Associated Press
A London Underground train arrives at a station in south London, during snowfall, Sunday, Jan. 20, 2013. (AP Photo/Lefteris Pitarakis)
A London Underground train arrives at a station in south London, during snowfall, Sunday, Jan. 20, 2013. (AP Photo/Lefteris Pitarakis)
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