Three years celebrex purchase Students clash with riot police during a protest against Rio de Janeiro governor Sergio Cabral in front of his residence, near Leblon beach in Rio de Janeiro. Tens of thousands of Brazilians have taken to the streets this month in the biggest protests in 20 years, fueled by an array of grievances including poor public services, the high cost of World Cup football stadiums and corruption. REUTERS/Ana Carolina Fernandes
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