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    Why retaking land isn't enough to vanquish IS
Iraq this week started to move in on western Mosul. But just taking territory back from so-called Islamic State in Iraq and Syria will not be enough to vanquish it, says the ÃÛÑ¿´«Ã½'s Jonathan Marcus.
Photo: Smoke rises from western Mosul as Iraqi military forces start their effort to retake it.
Credit: EPA
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