Sun staff predicts the Ravens-Jets game

Luton Airport in London

A sign warns passengers of flight delays and cancellations after Britain's National Air Traffic Control Service ordered the closure of airports at midday and said later that it would last until at least 6 a.m. Friday morning. (10 p.m. Thursday PDT). Related links: Volcanic ash closes European airports, stranding tens of thousands of travelers Video: Raw footage of the ash cloud Graphic: Flight hazard
Matt Dunham / Associated Press
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