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Enrique Pena Nieto speaks during an interview with The Associated Press at the Los Pinos presidential residence in Mexico City, Monday, Dec. 10, 2012. Pena Nieto says he'll mount a "real fight" against production and trafficking of marijuana, despite its legalization in two U.S. states. (AP Photo/Dario Lopez-Mills)

Associated Press
Enrique Pena Nieto speaks during an interview with The Associated Press at the Los Pinos presidential residence in Mexico City, Monday, Dec. 10, 2012. Pena Nieto says he'll mount a "real fight" against production and trafficking of marijuana, despite its legalization in two U.S. states. (AP Photo/Dario Lopez-Mills)
Enrique Pena Nieto speaks during an interview with The Associated Press at the Los Pinos presidential residence in Mexico City, Monday, Dec. 10, 2012. Pena Nieto says he'll mount a "real fight" against production and trafficking of marijuana, despite its legalization in two U.S. states. (AP Photo/Dario Lopez-Mills)
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