Intervention police forces cordon the Federal Police headquarters off, as former Brazilian president Luiz Inacio Lula da Silva is awaited to start his 12-year term imprisoned, in Curitiba, Parana State, Brazil, on April 6, 2018. Ex-president Luiz Inacio Lula da Silva, a fallen giant of leftwing politics and still frontrunner in Brazil's October presidential elections, was deciding Friday whether to resist an order to surrender and start a 12-year prison sentence for corruption. / AFP PHOTO / Mauro PIMENTEL