A four-part series profiling Russian leader Vladimir Putin - after eight years as president and four as prime minister, one of the world's most powerful men. He has declared his party victorious in parliamentary elections widely seen as fraudulent and announced his intention to return as president. How did the former KGB man make himself a valued ally of the west, and what made Washington and London turn against him? The final episode of the series tells the inside story of two relationships: Barack Obama's campaign to win over Russia's new President Dmitry Medvedev, and Medvedev's own complex dealings with Vladimir Putin.
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