In this image taken from amateur video, smoke from the Grimsvotn volcano, Iceland is seen from a plane Saturday, May 21, 2011. Iceland's most active volcano has started erupting, scientists said Saturday, just over a year after another eruption on the North Atlantic island shut down European air traffic for days, but the impact of this volcanic eruption is not yet known. (AP Photo/Amateur video via APTN) ICELAND OUT, TV OUT