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Petrobras, Brazil's state-owned oil company, was at the center of a massive corruption scandal that embroiled former president Fernando Collor de Mello. Collor was accused of receiving millions of dollars in bribes from Petrobras executives in exchange for favorable treatment and lucrative contracts. The scandal led to Collor's impeachment and removal from office in 1992, making him the first democratically elected president in Brazil's history to be impeached.