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Gabriel Faria Barbosa, 13, stands during practice session at SERC Santa Maria gymnasium's center in Sao Caetano do Sul, near Sao Paulo August 10, 2012. Brazilian gymnast Arthur Zanetti, 22, who won the gold medal in the men's gymnastics rings at the London 2012 Olympic Games, has been training at the center since he was seven years old. REUTERS/Nacho Doce