Brazil presidential candidate Marina Silva speaks at a rally

BRASILIA, BRAZIL - SEPTEMBER 14: Marina Silva, the Brazilian Socialist Party (PSB) presidential candidate speaks during a campaign rally as Rodrigo Rollemberg (L), Distrito Federal's Governor candidate for the PSB, and vice presidential candidate, Beto Albuquerque (2nd R) stand next in Ceilandia, Brasilia, Brazil on September 14, 2014. (Photo by Lucy Jordan/Anadolu Agency/Getty Images)