In this photo taken Friday, July 6, 2012, Ronaldo da Silva, left, and fellow inmates pedal stationary bikes to charge car batteries at a prison in Santa Rita do Sapucai, Brazil. An innovative program ... more 
In this photo taken Friday, July 6, 2012, Ronaldo da Silva, left, and fellow inmates pedal stationary bikes to charge car batteries at a prison in Santa Rita do Sapucai, Brazil. An innovative program allows inmates at this medium-security prison to shave days off their sentence in exchange for riding stationary bikes hooked up to converted car batteries that are used to illuminate Santa Rita do Sapucai's town square. (AP Photo/Felipe Dana) less 
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Associated Press | Photo By Felipe Dana
Tue, Jul 10, 2012 12:51 PM EDT