[IMG]http://d.yimg.com/a/p/afp/20100419/capt.p***o_1271617279534-3-0.jpg?x=130&y=86&q=85&sig=LNqfhlp_DHVtWzL20lUvqg--[/IMG]AFP - Airlines urged a re-think of flight restrictions as a volcanic ash cloud made Europe a virtual no-fly zone for a fourth straight day Sunday with nearly seven million passengers affected.




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