Brazil's Rousseff promises to tackle graft, target growth Seeking to restore credibility hit by a huge graft scandal at oil giant Petrobras and years of pallid economic growth, Brazilian President Dilma Rousseff embarked Thursday on a second term vowing to tackle corruption and revamp the economy without dismantling the social welfare programs that secured her poll triumph. IMAGES AND SOUNDBITES of Dilma Rousseff at the presidential palaca, after her speech in front of the Congress