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U.S soldiers smile as they wake up in a hill top near town of Walli Was in Paktika province near border with Pakistan

An Afghan border policeman ecorts a detained suspected Taliban fighter near Walli Was in Paktika province near border with Pakistan

Friends, 'frenemies,' foes weigh in on US presidential election

Pakistan already cracking down on Haqqani network-govt

FACTBOX-U.S. candidates Obama and Romney on foreign policy

Pakistani scientist loses appeal on shooting conviction