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U.S.-backed forces enter ISIS' last stronghold in Syria

The battle to clear ISIS from its last stronghold in Syria entered a critical new phase. For more than two months, Charlie D'Agata has been reporting from the frontlines of eastern Syria where U.S.-backed forces are making what they hope is the final move against ISIS. D'Agata went to see the fight under cover of darkness in Baghouz, Syria.
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