Blind capoeira teacher Kanoa performs inside a "roda" during a session at the Fallet slum, in Rio de...
Blind capoeira teacher Joao Kanoa performs inside a "roda" (wheel) during a session at the Fallet slum, in Rio de Janeiro May 8, 2013. Kanoa says he lost his vision at work seventeen years ago when the change of temperature inside a cold-storage room damaged his retina. REUTERS/Pilar Olivares(BRAZIL - Tags: SOCIETY)