Supporters of Brazilian presidential candidate for the ruling Workers... News PhotoBrazil,Candidate,Dilma Rousseff,Domination,Horizontal,Internet,One Person,People,Political Party,Politics,Porto Alegre,Presidential Candidate,Receiving,Rio Grande do Sul State,Social Networking,Southern Brazil,Supporter,Technology,Twitter,Workers PartyPhotographer Collection: AFP 2010 AFPSupporters of Brazilian presidential candidate for the ruling Workers Party, Dilma Rousseff, receive a class on how to use Twitter and other Internet tools to spread information about the candidate in Porto Alegre, southern Brazil, on October 15, 2010. Rousseff and Jose Serra, of the Brazilian Social Democratic Party (PSDB), will face each other on October 31 in the run-off election. AFP PHOTO/JEFFERSON BERNARDES (Photo credit should read JEFFERSON BERNARDES/AFP/Getty Images)