Blind capoeira teacher Joao Kanoa reaches for a towel at his home before giving classes, at the Fallet slum in Rio de Janeiro April 12, 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. Picture taken April 12, 2013. REUTERS/Pilar Olivares (BRAZIL - Tags: SOCIETY)