The head of Brazil's state oil giant Petrobras said on Tuesday that a European company would monitor a probe into the cause of an accident that sank Petrobras' biggest oil rig and killed 11 earlier this month. Yet again, Petrobras President Henri Philippe Reichstul rebuffed accusations of negligence by the company's top management, but pledged to punish those responsible for the blasts that destroyed the Reichstul said in his testimony in the Senate that Norwegian classification agency Det Norske Veritas -- the world's biggest body responsible for surveying and verifying seaworthiness -- would provide an independent report on the investigation into the causes of the accident. "For us, it is a matter of honor...