RIO DE JANEIRO, BRAZIL - APRIL 10: Renilson Vitorino da Silva (L) and Marcio Barreto Silva of Brazil run a marathon as a test event for the Rio 2016 Olympic games, at the Aterro do Flamengo on April 10, 2016 in Rio de Janeiro, Brazil. The traditional Sambodromo, place of the start and finish of the race, normally used for the samba schools parade of the world famous Rio de Janeiro carnival, will host Marathon and Archery disciplines during the upcoming Olympics. (Photo by Buda Mendes/Getty Images)
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