This file photo shows a Christmas tree at Rodrigo de Freitas Lagoon in Rio de Janeiro, Brazil on Dec. 15, 2014. The Rio 2016 Olympic Games will be held from August 5 to 21. (Photo/Xinhua)
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This file photo shows a Christmas tree at Rodrigo de Freitas Lagoon in Rio de Janeiro, Brazil on Dec. 15, 2014. The Rio 2016 Olympic Games will be held from August 5 to 21. (Photo/Xinhua)
