People walk next to the Petrobras headquarters in Rio de Janeiro
People walk next to the Petrobras headquarters (R) in Rio de Janeiro February 4, 2015. The chief executive and other senior management at Brazil's Petrobras resigned on Wednesday amid a festering corruption scandal, unleashing a scramble to find replacements capable of restoring investor confidence in the state-run oil company. REUTERS/Ricardo Moraes (BRAZIL - Tags: ENERGY POLITICS CRIME LAW)