Submarines used to smuggle drugs into U.S.
Video BBC news report (video).
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Headless bodies found in Mexico.
August 2008: Police in Mexico say they have found three decapitated bodies on a rubbish dump in Tijuana, in the latest incident of gang-related violence.
Mexican 'dissolved 300 bodies'.
Jan 2009: A man arrested by Mexican police says he disposed of 300 bodies for a drugs gang over the past decade by dissolving them in chemicals.
Dealing with drug-trafficking, MARCH 2009
The BBC's John Simpson interviews Mexican President Felipe Calderon. MARCH 2009. "There are 10,000 gun shops along the Mexican/US border."