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Office of National Drug Control Policy Director Gil Kerlikowske, left, answers a question as U.S. Secretary of Homeland Security Janet Napolitano looks on during a news conference Thursday, July 7, 2011, in Nogales, Ariz. The government's updated security plan for the U.S.-Mexico border keeps its focus on trying to stop drug and gun smuggling but contains an added emphasis on preventing and treating drug use in communities along the border.