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CORRECTS SPELLING OF SERGEI - Alexei Navalny, a prominent anti-corruption whistle blower and blogger, left, and opposition leader Sergei Udaltsov speak to protesters gathered near the presidential administrations building in downtown Moscow early Tuesday, May 8, 2012, a day after Putin's inauguration. Vladimir Putin took the oath of office in a brief but regal Kremlin ceremony on Monday, while on the streets outside thousands of helmeted riot police prevented hundreds of demonstrators from protesting his return to the presidency. (AP Photo/Alexander Zemlianichenko Jr )

Associated Press
CORRECTS SPELLING OF SERGEI - Alexei Navalny, a prominent anti-corruption whistle blower and blogger, left, and opposition leader Sergei Udaltsov speak to protesters gathered near the presidential administrations building in downtown Moscow early Tuesday, May 8, 2012, a day after Putin's inauguration. Vladimir Putin took the oath of office in a brief but regal Kremlin ceremony on Monday, while on the streets outside thousands of helmeted riot police prevented hundreds of demonstrators from protesting his return to the presidency. (AP Photo/Alexander Zemlianichenko Jr )
CORRECTS SPELLING OF SERGEI - Alexei Navalny, a prominent anti-corruption whistle blower and blogger, left, and opposition leader Sergei Udaltsov speak to protesters gathered near the presidential administrations building in downtown Moscow early Tuesday, May 8, 2012, a day after Putin's inauguration. Vladimir Putin took the oath of office in a brief but regal Kremlin ceremony on Monday, while on the streets outside thousands of helmeted riot police prevented hundreds of demonstrators from protesting his return to the presidency. (AP Photo/Alexander Zemlianichenko Jr )
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