Brazil's Olympic boxer Esquiva Falcao Florentino, left, President of the Brazilian Olympic Committee Carlos Arthur Nuzman, third from left, Brazil's President Dilma Rousseff, fourth from left, Rio de Janeiro's Mayor Eduardo Paes, fourth from left, and Olympic boxer Yamaguchi Falcao Florentino hold up the Olympic flag in Brasilia, Brazil, Tuesday, Aug. 14, 2012. The Falcao Florentino brothers both won medals at the London Summer Olympic Games. Esquiva Falcao won the silver in the 75 kg category and Yamagucho Falcao won the bronze in the 81 kg category. Rio will host the games in 2016. (AP Photo/Fabio Pozzebom)