Smoke and ash rise from Iceland's Grimsvotn volcano, which lies under the Vatnajokull glacier, about 120 miles east of the capital, Rejkjavik, on Saturday, May 21, 2011. (AP Photo, Jon Gustafsson)

Photo by: Jon Gustafsson

Smoke and ash rise from Iceland's Grimsvotn volcano, which lies under the Vatnajokull glacier, about 120 miles east of the capital, Rejkjavik, on Saturday, May 21, 2011. (AP Photo, Jon Gustafsson)