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A Syrian Kurdish boy sits on a destroyed tank in the Syrian town of Kobane, also known as Ain al-Arab, on March 27, 2015. Islamic State (IS) fighters were driven out of Kobane on January 26 by Kurdish and allied forces. AFP PHOTO/YASIN AKGUL        (Photo credit should read YASIN AKGUL/AFP/Getty Images)
A Syrian Kurdish boy sits on a destroyed tank in the Syrian town of Kobane, also known as Ain al-Arab, on March 27, 2015. Islamic State (IS) fighters were driven out of Kobane on January 26 by Kurdish and allied forces. AFP PHOTO/YASIN AKGUL        (Photo credit should read YASIN AKGUL/AFP/Getty Images)

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    Meet the key players in Syria's civil war

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Meet the key players in Syria's civil war

Since it began in 2011 Syria's civil war has become an increasingly complicated conflict. CNN's Nic Robertson explores the main factions in that conflict.

Meet the key players in Syria's civil war

Since it began in 2011 Syria's civil war has become an increasingly complicated conflict. CNN's Nic Robertson explores the main factions in that conflict.