Rio de Janeiro: protest to defend Petrobras and the PT A few thousands people protested on Monday in Rio to "defend Petrobras and the Presal" (Brazil's state oil giant and a deepwater pre-salt oilfield.) The corruption scandal surrounding Petrobras and around 50 politicians alleged to have taken billions in bribes could threaten president Dilma Rousseff's reelection in October. Images and soundbites.