What to know as Brazil prepares for tense presidential run-off

Brazilian voters will go to the polls on October 25 to choose between President Luiz Inácio Lula da Silva and right-wing Senator Flávio Bolsonaro in a presidential run-off. Bolsonaro won 47 percent of the vote in the first round on October 4, compared with just over 45 percent for Lula, but neither secured the majority needed to win outright. A Bolsonaro victory could energise conservatives across the region and bring Brazil closer to other Latin American countries that have elected far-right candidates.