People walk past graffiti on a building in the Morro da Providencia slum in Rio de Janeiro
People walk past graffiti on a building in the Morro da Providencia slum in Rio de Janeiro November 29, 2012. The artwork of Portuguese artist Alexandre Farto aka Vhils decorate the walls with faces that represent the people who live in Providencia, the oldest slum in Rio de Janeiro. REUTERS/Pilar Olivares (BRAZIL - Tags: SOCIETY)