[img]http://d.yimg.com/a/p/ap/20100416/capt.f7ddcf2dbf0243a49b09892f8da0be53-c7ff76149f7045b1b78270cdc5ad6781-0.jpg?x=90&y=130&q=85&sig=kQMlV2C1tmWYxj9h7.4zoA--[/img]AP - Thick drifts of volcanic ash blanketed parts of rural Iceland on Friday as a vast, invisible plume of grit drifted over Europe, emptying the skies of planes and sending hundreds of thousands in search of hotel rooms, train tickets or rental cars.