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Mexican drug trafficker Joaquin Guzman Loera aka 'el Chapo Guzman', is escorted by marines as he is presented to the press on February 22, 2014 in Mexico City.
Mexican drug trafficker Joaquin Guzman Loera aka 'el Chapo Guzman', is escorted by marines as he is presented to the press on February 22, 2014 in Mexico City.

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    DEA: 'El Chapo's' cartel responsible for 25% of drugs in U.S.

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DEA: 'El Chapo's' cartel responsible for 25% of drugs in U.S.

Joaquin "El Chapo" Guzman's Sinaloa Cartel, considered by many to be the most powerful drug trafficking organization in the world, has established a growing presence within the United States. CNN's Jean Casarez reports.

DEA: 'El Chapo's' cartel responsible for 25% of drugs in U.S.

Joaquin "El Chapo" Guzman's Sinaloa Cartel, considered by many to be the most powerful drug trafficking organization in the world, has established a growing presence within the United States. CNN's Jean Casarez reports.