US attack on Venezuela risks Vietnam-style regional conflict, warns Lula adviser

Brazil aide says Trumps closure of Venezuelan airspace amounts to an act of war that could escalateMaduro says the real reason for Trumps Venezuela fixation is oil - is he right?A US invasion or attack on Venezuela could plunge South America into a Vietnam-style conflict, the chief foreign policy adviser to Brazils president, Luiz Inácio Lula da Silva, has warned.In an interview with the Guardian, Celso Amorim called Donald Trumps recent decision to order the closure of Venezuelan airspace an a...