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Russian President Vladimir Putin (R) and Turkish Prime Minister Recep Tayyip Erdogan attend on a press conference after their meeting to discuss differences on Syria as UN Security Council prepared to vote on the conflict, in Moscow's Kremlin on July 18, 2012. Russia said today a decisive battle was in progress in Syria and rejected a Western-backed UN resolution on the crisis as it would mean taking sides with a revolutionary movement. AFP PHOTO/KIRILL KUDRYAVTSEV        (Photo credit should read KIRILL KUDRYAVTSEV/AFP/GettyImages)
Russian President Vladimir Putin (R) and Turkish Prime Minister Recep Tayyip Erdogan attend on a press conference after their meeting to discuss differences on Syria as UN Security Council prepared to vote on the conflict, in Moscow's Kremlin on July 18, 2012. Russia said today a decisive battle was in progress in Syria and rejected a Western-backed UN resolution on the crisis as it would mean taking sides with a revolutionary movement. AFP PHOTO/KIRILL KUDRYAVTSEV        (Photo credit should read KIRILL KUDRYAVTSEV/AFP/GettyImages)

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Putin and Erdogan: A clash of egos

CNN's Matthew Chance explores the tense relationship between Russian President Vladimir Putin and Turkish President Recep Tayyip Erdogan.

Putin and Erdogan: A clash of egos

CNN's Matthew Chance explores the tense relationship between Russian President Vladimir Putin and Turkish President Recep Tayyip Erdogan.