Lava spews out of a mountain on March 21, 2010 in Hvolsvöllur in the region of the Eyjafjallajokull glacier in Iceland. The small volcano eruption that forced more than 600 people to flee their homes in Iceland over the weekend could conceivably set off a larger volcano. ICELAND OUT AFP PHOTO / fiór Kjartansson (Photo credit should read fiór Kjartansson/AFP/Getty Images)
Lava spews out of a mountain on March 21
