Jose Dirceu, former Brazilian President Luiz Inacio Lula da Silva's chief of staff,  attends a session of the Parliamentary Committee of Inquiry in Curitiba, Brazil, August 31, 2015. Brazilian police on August 3 arrested former government minister Dirceu, one of the most senior members of the ruling Workers' Party to be detained so far in the corruption scandal engulfing state-run oil company Petrobras. REUTERS/Rodolfo Buhrer ORG XMIT: BRA104
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