x     Brazilian President Luiz Inácio Lula da Silva warned Monday that the country must be prepared to defend itself against potential external threats, as global geopolitical tensions intensify, during a joint appearance with South African President Cyril Ramaphosa in Brasília. “If we are not prepared to defend ourselves, at any moment we could be invaded,” Lula said during Ramaphosa’s official visit to the Planalto presidential palace. The Brazilian leader raised the issue while discussing