Workers from a company under contract for the Brazilian state-owned oil company Petrobras take part in a protest to demand the payment of three months of wages in arrears, in front of the Petrobras building in Rio de Janeiro, Brazil, on February 4, 2015. The chief executive of Brazilian oil giant Petrobras, Graca Foster, resigned along with the entire board of directors as the company reels from a massive corruption scandal, officials said. AFP PHOTO/VANDERLEI ALMEIDA (Photo credit should read VANDERLEI ALMEIDA/AFP/Getty Images)
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