The U.S. military has been rolling back the Islamic State's territorial expansion in Iraq and Syria, but the ability of the group to launch a massacre like last week's Paris attacks is triggering calls for a change in strategy for combating the extremists. "It doesn't require territory to launch these kinds of attacks," said Matthew Henman, head of IHS Jane's Terrorism and Insurgency Center. He said attacking militants in Iraq and Syria was a start, but it won't necessarily undermine the group's ability to strike around the globe. The terror attack came last week just as U.S.-backed Kurdish forces made headway in retaking a key...
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