Black faced rams walk in a snow covered field near the village of Cargin in the Glens of Antrim, Northern Ireland Dec 19, 2010. The severe weather led to more disruption across Northern Ireland on Sunday, and people were advised to avoid unnecessary road journeys as snow continued to cause travel problems, local media reported. [Photo/Agencies]

An aircraft is parked on the snow covered tarmac of Zaventem international airport near Brussels Dec 19, 2010. Heavy snow and freezing temperatures caused travel chaos across northern Europe during the weekend, with about 1,500 passengers being stranded for the night in Brussels due to bad weather conditions. [Photo/Agencies]