Trains stand idle in the snow at Clapham Junction in South London
Trains stand idle in the snow at Clapham Junction in South London, December 2, 2010. Heavy snow caused travel chaos across much of northern Europe on Thursday, keeping London's Gatwick airport closed for a second day and disrupting road and rail travel in France, Germany and Switzerland.REUTERS/Andrew Winning (BRITAIN - Tags: ENVIRONMENT POLITICS TRANSPORT)