The Heron TP medium altitude long endurance unmanned aerial vehicle takes off from Comalapa International Airport in San Salvador, El Salvador, May 21, 2009, during a counter drug operations support mission. The Heron is part of an unmanned aircraft system deployed to El Salvador to support Project Monitoreo, a month-long evaluation initiative to assess the suitability of using unmanned aircraft for counterdrug missions in the United States Southern Command area. (U.S. Army photo by Jose Ruiz/Released). Date Shot: 5/21/2009