Brazilian President Luiz Inacio Lula da Silva has launched his campaign for October's presidential election, presenting himself as an experienced leader capable of steering the country through global uncertainty.
The 80-year-old president formally launched his candidacy at the Workers' Party (PT) convention in Sao Paulo.
Lula urged greater investment in defence and stressed the need to protect Brazil's sovereignty amid trade and diplomatic tensions with the United States.
"I want to be prepared so that no one invades this country," he said.
The former metalworker and union leader is seeking a fourth and final term in office after returning to power three years ago.
Regional challenges
Former finance minister Fernando Haddad, who is running for governor of Sao Paulo state, described Lula as an experienced leader at a time of global instability.
"The world is in turmoil. Today, we face wars and the rise of the far right. In times of rough seas like these, you need a reliable, experienced sailor," Haddad said.
Lula said he would not seek another term after a fourth presidency.
"The octogenarian's main election rival is Flavio Bolsonaro, the eldest son of former president Jair Bolsonaro.
Lula also referred to Brazil's reserves of critical minerals, saying: "Neither the Chinese, nor the Americans, nor the French are going to get their hands on our rare earths."
Last month, the United States imposed two rounds of tariffs on Brazilian goods, alleging unfair trade practices.
Vice President Geraldo Alckmin also addressed the convention, defending Brazil's electronic voting system.
A recent Datafolha poll showed Lula leading Flavio Bolsonaro by 48 percent to 43 percent in a potential second-round vote.
