A passenger sleeps on the floor after flights were canceled at Edinburgh Airport in Edinburgh, Scotland Tuesday, May 24, 2011. A dense ash cloud from an Icelandic volcano blew toward Scotland, causing... more 
A passenger sleeps on the floor after flights were canceled at Edinburgh Airport in Edinburgh, Scotland Tuesday, May 24, 2011. A dense ash cloud from an Icelandic volcano blew toward Scotland, causing airlines to cancel Tuesday flights and raising fears of a repeat of last year's travel disruptions in Europe that stranded millions of passengers. less 
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Associated Press | Photo By Scott Heppell
Tue, May 24, 2011 4:06 AM EDT