12/23/2014 12:32 am ET Updated Dec 23, 2014

Taliban Push Into Afghan Districts That U.S. Had Secured

Anadolu Agency via Getty Images

In a large swath of the Taliban heartland in southern Afghanistan, government centers are facing a long-dormant concern this winter: Four years after the American troop surge helped make such places relatively secure, they are back under threat from the insurgents.

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