Protests have erupted across Brazilian cities after President Dilma Rousseff appointed her predecessor Luiz Inacio "Lula" da Silva as chief of staff and a taped conversation fed opposition claims the move was meant to shield the former leader from prosecution.
Tens of thousands of protesters on Wednesday took to the streets of the capital Brasilia and Sao Paulo, the country's financial hub, demanding Rousseff's resignation.
Critics said Lula's appointment as