Cleaners in Rio de Janeiro collect debris from Guanabara Bay that washed up onto the beach last December. The bay, which will host sailing events at the Olympics in August, is heavily polluted. Yasuyoshi Chiba/AFP/Getty Images hide caption

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For Olympic Sailors And Fishermen Alike, Rio's Dirty Bay Sets Off Alarms

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Yolande Mabika, a refugee and judo athlete from the Democratic Republic of Congo, stands outside her newly rented apartment in Rio de Janeiro. Mabika and fellow Congolese athlete Popole Misenga came to Brazil in 2013 to compete in a judo championship; they became refugees after their coach vanished with their passports and money. Felipe Dana/AP hide caption

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For The First Time, A Team Of Refugees Will Compete At The Olympics

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Tejay van Garderen says even a small risk from the Zika virus is enough to make him stay home with his wife, who is pregnant. He's seen here last year ahead of the start of the Tour de France cycling race. Christophe Ena/AP hide caption

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A man performs yoga in the Babilonia favela overlooking Rio de Janeiro in 2014. The Brazilian government made a big push to impose order on the shantytowns in advance of the World Cup in 2014 and the Olympics this summer. Babilonia was once considered a model, but violence has been on the rise in the run-up to the games. Mario Tama/Getty Images hide caption

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As Olympics Near, Violence Grips Rio's 'Pacified' Favelas

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Teenagers sit on a new sign reading "Cidade Olimpica" (Olympic City) in Rio de Janeiro's port district last October. Ahead of this summer's Olympic Games, the port district is undergoing an urban renewal program. Ticket sales have been slow, and many Brazilians cite the poor state of the economy, which is in recession. Mario Tama/Getty Images hide caption

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Brazil's Latest Headache: Ticket Sales Lag For Rio Olympics

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A boy fishes in polluted Guanabara Bay in Rio de Janeiro in August 2015. The bay will be the sailing venue for the Olympic Games this summer. Brazil is facing concerns over polluted water, mass transportation and budget issues as it prepares for the games. Mario Tama/Getty Images hide caption

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Amid Recession, Brazil Struggles With The Huge Costs Of The Olympics

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Concerns about pollution in the waters around Rio have prompted the world sailing federation to take action ahead of next year's Olympic Games. Here, garbage is seen on Bica Beach, on the banks of the Guanabara Bay, with the Sugar Loaf mountain in background, earlier this year. RICARDO MORAES/Reuters /Landov hide caption

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The U.S. Olympic Committee has chosen Boston to bid on hosting the 2024 Summer Olympics. Committee Chairman Larry Probst is seen speaking last February. Joe Scarnici/Getty Images hide caption

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Maria Victoria Agostinho, 5, walks outside her home in the Vila Autodromo area of Rio. Her family is slated for eviction, along with others in the area, to make way for building projects related to the 2016 Summer Olympics. Lianne Milton for NPR hide caption

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As Brazil Gears Up For Olympics, Some Poor Families Get Moved Out

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Local authorities celebrate a demolition explosion that's part of Rio's Porto Maravilha urbanization project, in Rio de Janeiro, on Nov. 24, 2013. The state- and federal-supported project is part of the city's redevelopment ahead of the 2016 Summer Olympic Games. Pilar Olivares/Reuters /Landov hide caption

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Olympics Set To Transform Rio — But For Better Or Worse?

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The delegation of the International Federation of Associated Wrestling Styles celebrates as its sport is voted to be included in the 2020 and 2024 Summer Olympic Games. Scott Halleran/Getty Images hide caption

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Tokyo will host the 2020 Summer Games, IOC officials said Saturday. In Tokyo, five-time Paralympian Wakako Tsuchida, left, and former Olympic athletes Hiromi Miyake, center, and Yoshiyuki Miyake cheer the news. Atsushi Tomura/Getty Images hide caption

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