Trees are seen through the glass covered with ice crystals in Moscow, capital of Russia, December 18, 2009. Commuters and air passengers faced delays and disruption across many countries of Europe on Friday, after heavy snowfall with the forecaster saying more was on the way. [Xinhua]

Ice crystals on the glass are seen in Moscow, capital of Russia, December 18, 2009. An arctic cold snap swept Moscow, bringing the lowest temperature down to minus 28 degrees Celsius on December 16. [Xinhua]