The US government is renewing efforts to keep drug-related violence - and the contraband itself - from spilling over its border with Mexico.
The killing of a rancher in the southwestern US state of Arizona in March has prompted authorities there to press Washington for even tighter security against the traffickers.
Ranchers say they have been dragged into the drug war by virtue of their location along a porous and increasingly dangerous border.
Al Jazeera's Monica Villamizar reports from a border ranch in Nogales, Arizona, where one rancher shares how he feels about life in the middle of an illegal migration route between Arizona and Mexico.
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