Serhat TUNAR -TDO-  Jair Bolsonaro, who was elected on a promise to fight crime and corruption, has been sworn in as Brazil's new president in front of Congress in Brazil.

In a ceremony marked by pomp and tight security, the new president of Latin America's biggest economy pledged to uphold the constitution as he began his four-year mandate.

The longtime politician and former paratrooper intend to open up the country's protectionist economy to the free market, and priorities business interests ahead of environmental concerns. He has also vowed to cut bureaucracy and halt corruption.

Bolsonaro's praise for aspects of Brazil's 1964-1985 military dictatorship stirred concerns among some voters but his supporters have high hopes for the new presidency.

Bolsonaro has promised a more forceful foreign policy, declaring he will do all he can to challenge leftist-ruled Venezuela and Cuba.