Ash Cloud over Europe  
Thick drifts of volcanic ash blanketed parts of rural Iceland on Friday, 16th April as a vast, invisible plume of grit drifted over Europe. (AP Photo/Brynjar Gauti)
The volcano in southern Iceland's Eyjafjallajokull glacier sends ash into the air Saturday, April 17, 2010. (AP Photo/Brynjar Gauti)
Chunks of ice from a glacial flood triggered by a volcanic eruption lie in front of the still-erupting volcano near Eyjafjallajokul on April 17, 2010. (REUTERS/Lucas Jackson)
Lightning, smoke and lava above Iceland's Eyjafjallajokul volcano on April 17, 2010. (REUTERS/Lucas Jackson)
Lava and lightning light the crater of Eyjafjallajokul volcano on April 17, 2010. (REUTERS/Lucas Jackson)
Lightning and ash  from the Volcanon on April 18th, 2010. Photo by Olivier Vandeginste more of his volcano photos
View seen from a road leading to the volcano as it continues to billow smoke and ash during an eruption on April 17, 2010.  (HALLDOR KOLBEINS/AFP/Getty Images)
Car driving near Kirkjubaejarklaustur, Iceland, through the ash from the volcano eruption under the Eyjafjallajokull glacier on Thursday April 15, 2010. (AP Photo/Omar Oskarsson)
Wearing a mask and goggles to protect against the smoke, dairy farmer Berglind Hilmarsdottir from Nupur, Iceland, looks for cattle lost in ash clouds, Saturday, April 17, 2010. (AP Photo/Brynjar Gauti)
Farmer Thorarinn Olafsson tries to lure his horse back to the stable as a cloud of black ash looms overhead in Drangshlid at Eyjafjoll on April 17, 2010. (REUTERS/Ingolfur Juliusson)
Farmers team up to rescue cattle from exposure to the toxic volcanic ash at a farm in Nupur, Iceland. Saturday, April 17, 2010. (AP Photo/Brynjar Gauti)
A dark ash cloud looms over the Icelandic south coast April 17, 2010. (REUTERS/Ingolfur Juliusson)
Click on an image to see a slideshow