FTS 18:30 Live: Bernie Sanders under sustained attack ahead of the presidential debate in South Carolina, as his decisive lead in the primaries has the Democratic Party establishment spooked. Opposition lawmakers in Colombia launch an investigation into President Duque, after a fugitive senator revealed details of electoral corruption. And as Carnival comes to a close, we are with one Brazilian street band that has been drumming in protest since the dictatorship. More on these and other stories now.