4 of 20: The Christ the Redeemer statue, top right, is lit in red light to commemorate the World AIDS Day in Rio de Janeiro, Brazil, Thursday, Dec. 1, 2011. Rio de Janeiro's city government illuminated several urban monuments in red as part of its actions to commemorate the World AIDS Day. (AP Photo/Victor R. Caivano) (AP Photo/ Victor R. Caivano)

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