MILAN, ITALY – APRIL 19: A general view of the Linate Airport on April 19, 2010 in Milan, Italy. The airport was closed due to the cloud of volcanic ash from Volcano Eyjafjallajokull Iceland moving across Northern Europe. Airspace across northern Italy will remain closed until 06.00 GMT on April 20. (Photo by Vittorio Zunino Celotto/Getty Images)