BRASILIA, July 11 -- Brazil scrambled to respond to US President Donald Trump's announcement of 50% tariffs on Brazilian exports, with President Luiz Inacio Lula da Silva holding an urgent cabinet meet on Thursday as officials worked to de-escalate the crisis. While Lula said on Wednesday that Brazil would respond with reciprocal measures, officials said diplomatic efforts were gaining traction within the administration on Thursday. Lula's chief of staff announced the formation of a working group to determine Brazil's response, but the president is unlikely to announce concrete steps until the tariffs are implemented. P17...