In this Sept. 5, 2014 photo, a soldier points out the border area, shared by the states of Texas and Tamaulipas, under gang influence on a map at a military base in Ciudad Mier, Tamaulipas state, Mexico. As Mexico prepares to develop rich shale fields along the Gulf Coast, and attract foreign investors, the country will be challenged to tame the brutal drug cartels that rule the region and steal billions of dollars’ worth of oil from pipelines. (AP Photo/Eduardo Verdugo)
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