FOR STORY RUSSIA ISLAMIC STATE THREAT Wednesday Oct.28, 2015 - FILE - In this Thursday, May 9, 2013, file photo bodies of killed militants lie surrounded by different kinds of explosives and weapons at Gubden in Dagestan, Russia. The Russian province of Dagestan, a flashpoint for Islamic violence in the North Caucasus, is feeding hundreds of fighters to the Islamic State in Syria, officials say, and now some are coming back home with experience gained from the battlefield.  (Abdula Magomedov/NewsTeam via AP,  File)
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