Washington (CNN) -- A Pakistan-based terrorist group that is actively attacking American troops across the border in Afghanistan is an "arm" of the Pakistani intelligence agency, the top U.S. military officer told Congress on Thursday. The blunt accusation from the chairman of the Joint Chiefs of Staff, Adm. Michael Mullen, reflected the growing impatience of U.S. officials with Pakistan's unwillingness to stop the attacks and the belief that Pakistan is actively supporting the insurgents. But the recent high profile attacks by insurgents in Afghanistan represent a shift in strategy by the Taliban, who have ceded control of territory in much of the country, the U.S. secretary of defense said Thursday.
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Pakistan denies its intelligence agency supports the Haqqani network
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Pakistan says to stop the allegations or "you will lose and ally"
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"The Haqqani network ... acts as a veritable arm of Pakistan's intelligence," Mullen says
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"The insurgency has been turned back in much" of Afghanistan, Panetta says
If @placeholder cannot come to an agreement on further spending cuts, an additional $500 million in defense spending would be cut.