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Ukraine marks 30th anniversary of the Chernobyl disaster; Inquest rules Hillsborough football fans were unlawfully killed; In the midst of a political crisis and an economic slow-down, is Brazil ready for The Olympics?

(Photo: The former Chernobyl nuclear power plant, including destroyed reactor four, as well as the New Safe Confinement structure that will one day enclose the remains of reactor four, stand behind the abandoned city of Pripyat. Credit: Sean Gallup/Getty Images)