Russian President Vladimir Putin (right) and British Prime Minister David Cameron met earlier this month. Cameron said then that he was encouraged by Russia's willingness to take part in a peace conference on Syria. Now, Russia is said to be angry about the EU's decision to lift an embargo on arming the Syrian opposition. Alexey Nikoksky /AFP/Getty Images hide caption

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A column of Russia's T-90 tanks rumbles over the cobblestones in Moscow's Red Square on May 9 during the country's Victory Day parade celebrating the anniversary of its costly victory over Nazi Germany in World War II. Yuri Kadobnov/AFP/Getty Images hide caption

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In Moscow's Red Square, people still line up to visit Lenin's tomb. Though the Cold War is over, Russia and the U.S. keep watchful eyes on each other. Tuesday, Russian officials claimed to have uncovered a CIA spy. Sergei Ilnitsky /EPA /Landov hide caption

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Firefighters battling the blaze at a psychiatric hospital north of Moscow early Friday. Jiang Kehong /Xinhua /Landov hide caption

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BRICS leaders, from left, Indian Prime Minister Manmohan Singh, Chinese President Xi Jinping, South African President Jacob Zuma, Brazil's President Dilma Rousseff and Russian President Vladimir Putin pose for a group picture during the BRICS 2013 Summit in Durban, South Africa, on Wednesday. Sabelo Mngoma/AP hide caption

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Russian tycoon Boris Berezovsky talks to the media on Aug. 31, 2012, after losing his case against Russian oligarch Roman Abramovich in London. Berezovsky was found Saturday dead at his home in Britain. Sang Tan/AP hide caption

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A man dressed as a skomorokh, a medieval East Slavic harlequin, distributes bliny in St. Petersburg, Russia, during the last day of Maslenitsa, March 1, 2009. Dmitry Lovetsky/AP hide caption

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A meteor's vapor trail above the city of Chelyabinsk, Russia, on Friday. Vyacheslav Nikulin /EPA /LANDOV hide caption

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