(Reuters) – Russian President Vladimir Putin attends the opening ceremony of the Sochi Winter Olympics on Friday determined to prove his doubters wrong after militant attacks, and ballooning costs overshadowed preparations. Putin has staked his reputation on hosting a safe and successful Games in the Black Sea resort of Sochi, where a spectacle before 40,000 spectators at the new Fisht Stadium will signal the start of the full sporting programme. He will be joined by […]