This file photo shows tourists walking in front of Lapa arch bridge in Rio de Janeiro, Brazil on April 25, 2015. The Rio 2016 Olympic Games will be held from August 5 to 21. (Photo/Xinhua)
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This file photo shows tourists walking in front of Lapa arch bridge in Rio de Janeiro, Brazil on April 25, 2015. The Rio 2016 Olympic Games will be held from August 5 to 21. (Photo/Xinhua)
