Corruption in Brazil: Ruling party faces Petrobras scandal
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This week, there's trouble at the top for Brazil's ruling party, which is accused of taking 200 million dollars' worth of kickbacks in return for huge contracts with the country's oil giant Petrobras.
Next, Hillary Clinton breaks her silence over a growing email scandal which could trouble her widely expected presidential bid.
Finally, in Chile, the shadow of General Pinochet looks set to loom large over the Copa America football tournament, which is due to kick off in June.