Dilma Rousseff has been sworn in as Brazil's first female president.
The 63-year-old career technocrat takes the helm of Latin America's largest nation, which has risen both financially and politically on the world stage under outgoing leader Luiz Inacio Lula da Silva.
Silva leaves office as the nation's most popular president. Rousseff was his hand-chosen successor.
Rousseff became Brazil's leader Saturday after taking the oath of office.
She is challenged with maintaining the success Brazil has seen under Silva.
The nation will host the 2014 World Cup and the 2016 Olympics.
Rousseff has sworn to eradicate poverty, improve a woeful education system and finish massive infrastructure projects seen as key the development.