Mexico

    The United States has begun to apply tactics perfected in the war in Afghanistan to tighten control of the border with Mexico, using a mix of age-old hunting techniques and high-tech spy-in-the-sky surveillance. On the ground, US Border Patrol agents on horseback, on foot, and in all-terrain vehicles scour the desert for the footprints of illegal border crossers so they can pursue and arrest them. (Reuters)

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