"U.S. attention to terrorism in Latin America intensified in the aftermath of the September 2001 terrorist attacks on New York and Washington, with an increase in bilateral and regional cooperation. In its 2013 'Country Reports on Terrorism' (issued in April 2014), the State Department maintained that the majority of terrorist attacks in the Western Hemisphere were committed by the Revolutionary Armed Forces of Colombia (FARC). The State Department asserted in that Latin American governments made modest improvements in their counterterrorism capabilities and border security, but that for some countries, corruption, weak government institutions, insufficient interagency cooperation, weak or nonexistent legislation, and a lack of resources impeded progress."
CRS Report for Congress, RS21049
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html