Nina Kolbe (R) waits for information about her cancelled flight to Dusseldorf in Germany at Gothenburg-Landvetter Airport, in Gothenburg May 24, 2011. Thousands of passengers were forced to abandon plans after ash from the eruption of Iceland's Grimsvotn volcano caused the cancellation of 500 flights on Tuesday, but officials said Europe's airways would be less disrupted than a year ago. [Photo/Agencies]