Brazilian President Dilma Rousseff attends the first working meeting of the G-20 summit in St. Petersburg, Russia, on Thursday. Handout/Getty Images hide caption

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A demonstrator is shot by a rubber bullet as anti-riot police officers charge during a protest Thursday against corruption and price hikes in Rio de Janeiro. Christophe Simon /AFP/Getty Images hide caption

itoggle caption Christophe Simon /AFP/Getty Images