Prisoners perform during a Christmas decorating contest inside their cell at the Nelson Hungria prison in Rio de Janeiro, Brazil, Thursday, Dec. 10, 2015. All of the 531 inmates at the Nelson Hungria prison has her own concrete bunk bed, and the spacious cinderblock cells were free of the overpowering stench, thick clouds of mosquitoes and troops of roaches that are a usually a staple of lockups here. (AP Photo/Silvia Izquierdo)

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