A man walks under an umbrella during snowfall in Algiers February 4, 2012. At least 10 cm (four inches) of snow fell on Saturday in the Algerian capital, on the northern tip of Africa. The snowfall, the first in the city in eight years and the heaviest in decades, brought the Mediterranean port to a standstill. REUTERS/Zohra Bensemra (ALGERIA – Tags: ENVIRONMENT TPX IMAGES OF THE DAY)