Fresh travel nightmare for thousands of passengers

Airlines ground hundreds of flights after a plume of ash from a volcano in Iceland blankets parts of Europe
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Airline passengers wait for flights at Edinburgh airport in Scotland, on May 24, 2011. Airlines halted hundreds of flights on Tuesday after a plume of ash from an erupting volcano in Iceland blew over Britain (AFP/Getty Images)
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A cloud of smoke and ash is seen over the Grimsvoetn volcano on Iceland on May 21, 2011 (Getty Images)
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In this handout sattillte image provided by NASA/GSFC, shows Grimsvotn volcano emitting ash plume on May 21, 2011 in Grimsvotn, Iceland. The cloud has forced the closure of Icelandic airspace and spread fears of a repeat of the global travel chaos that was caused by last year's Icelandic eruption, although authorities insist that this Grimsvotn poses a lesser threat
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A passenger looks at the flight information boards at Dublin International airport in Ireland, on May 24, 2011. Airlines grounded hundreds of flights Tuesday after a plume of ash from a volcano in Iceland blanketed Britain and touched Scandinavia in a fresh travel nightmare for thousands of passengers (AFP/Getty Images)
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Airline passengers sleep as they wait for flights at Edinburgh airport in Scotland, on May 24, 2011. Airlines halted hundreds of flights on Tuesday after a plume of ash from an erupting volcano in Iceland blew over Britain, even forcing US President Barack Obama to revise his travel plans. Barely a year after a similar eruption in Iceland forced the biggest closure of European airspace since World War II, Britain's flagship carrier British Airways was the first to suspend flights from London to Scotland. (AFP/Getty Images)
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Airline passengers wait for flights at Edinburgh airport in Scotland, on May 24, 2011. Airlines halted hundreds of flights on Tuesday after a plume of ash from an erupting volcano in Iceland blew over Britain (AFP/Getty Images)
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An airport worker (C) speaks with airline passengers at Edinburgh airport in Scotland, on May 24, 2011 (AFP/Getty Images)
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Flight information boards show delays and cancellations at Edinburgh airport in Scotland, on May 24, 2011 (AFP/Getty Images)
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People queue at the Ryanair check-in desk at Dublin International airport in Ireland on May 24, 2011. Ryanair has cancelled some 36 flights, affecting two flights between Dublin and Scotland caused by ash cloud from an Icelandic volcano that began to erupt on Saturday (AFP/Getty Images)
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Airline passengers wait for flights at Edinburgh airport in Scotland, on May 24, 2011. Airlines halted hundreds of flights on Tuesday after a plume of ash from an erupting volcano in Iceland blew over Britain (AFP/Getty Images)
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Airline passengers wait for flights at Edinburgh airport in Scotland, on May 24, 2011. Airlines halted hundreds of flights on Tuesday after a plume of ash from an erupting volcano in Iceland blew over Britain, even forcing US President Barack Obama to revise his travel plans (AFP/Getty Images)
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Airline passengers lie on the terminal floor as they wait for flights at Edinburgh airport in Scotland, on May 24, 2011 (AFP/Getty Images)