Farmers work in a field below the Galeras volcano in Colombia in 2005.  The volcano erupted February 14, 2009, sending ash over the provincial capital of Pasto and triggering the evacuation of 7,000 people.  The 14,110-foot peak is considered Colombia's most active volcano.  Smoke and ash drifted over Pasto after Galeras blew in January 17, 2008.