Drug War: Observations on U.S. International Drug Control Efforts, Statement of Joseph E. Kelley, Director-in-Charge, International Affairs Issues, National Security and International Affairs Division, Testimony before the Subcommittee on Coast Guard and Maritime Transportation, Committee on Transportation and Infrastructure, House of Representatives [open pdf - 467KB]
"In November 1993, the U.S. Policy on International Counternarcotics in the Western Hemisphere established a strategy for combatting the production and trafficking of cocaine. Among other things, the policy called for a gradual shift of resources from the transit zone of Mexico, Central America, and the Caribbean to the source countries of cocaine--primarily Colombia, Peru, and Bolivia. According to the Department of Defense, the amount of resources applied to the transit zone has been significantly reduced. However, to date, we have not seen a shift in resources to the source countries. For example, the Drug Enforcement Administration is reducing its presence in Colombia, the U.S. Southern Command is now flying fewer sorties per month in support of source-country interdiction than it did in 1993, and counternarcotics assistance to each of the three primary source countries is expected to be less in 1995 than in 1991 or 1992. Some agencies' programs and assets are better suited to interdiction in the transit zone than to the current source country strategy. However, shifting resources between and within agencies has been problematic."
Government Accountability Office (GAO): http://www.gao.gov/