Video: Mexico’s drug war deepens

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

Mexican drug cartels develop new tactics in drug war

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