Video: Mexico's drug war deepens

Al Jazeera spent a day with US police to see how well-organised cartels have become.

    The Mexican-US border has become a battleground in the war on drug cartels.

    Traffickers criss-cross the river that marks the border in a cat-and-mouse game with authorities on both sides.

    Al Jazeera's Mariana Sanchez spent a day with US police patrolling the area to see just how well-organised the cartels have become.

    SOURCE: Al Jazeera


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