Brazil election: Dilma Rousseff's victory

People walk past a campaign poster for the Workers party candidate, Dilma Rousseff, in Brasília during the presidential election runoff Photograph: Eraldo Peres/AP

Brazil's president, Luiz Inácio Lula da Silva, greets supporters after casting his vote in São Bernardo do Campo Photograph: Silvia Izquierdo/AP

Dilma Rousseff poses for photographers after voting in the presidential election runoff in Porto Alegre Photograph: Felipe Dana/AP

José Serra, the candidate of the Brazilian Social Democratic party (PSDB), embraces his daughter Veronica during a press conference in São Paulo after conceding defeat Photograph: Sebasti o Moreira/EPA

Dilma Rousseff greets supporters during her victory meeting in Brasília Photograph: Marcelo Sayao/EPA

Voters wearing Dilma Rousseff masks celebrate the result of the election in São Paulo Photograph: Paulo Whitaker/Reuters

Supporters of Dilma Rousseff celebrate her victory Photograph: Nelson Almeida/AFP/Getty Images

Hundreds of supporters celebrate Dilma Rousseff's victory on Paulista Avenue in São Paulo Photograph: Nelson Almeida/AFP/Getty Images

A supporter of Dilma Rousseff wears a mask of her face on Paulista Avenue in São Paulo Photograph: Nelson Almeida/AFP/Getty Images

People celebrate the result of Brazil's presidential election Photograph: Ricardo Moraes/Reuters

Supporters of the president elect, Dilma Rousseff, celebrate her victory at Leme beach in Rio de Janeiro Photograph: Marcio Mercante/AFP/Getty Images

Supporters of Dilma Rousseff celebrate in São Paulo Photograph: Silvia Izquierdo/AP