The chief of Petrobras and five other executives have quit over a corruption scandal at the Brazil-owned oil group that is threatening to engulf the government of president Dilma Rousseff.
The departures mark the denouement in a corrosive drama that has gripped Brazil and crippled one of Latin America’s most important companies.
Once admired for its technological prowess and massive oil discoveries, Petrobras has become a symbol of
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