The United Nations Conference on Sustainable Development, or Rio+20, begins today in Rio de Janeiro, Brazil. An outgrowth of the Earth Summit held in Rio in 1992, the conference is designed to bring together 50,000 delegates from state governments, institutions, and non-governmental organizations to create measures to reduce poverty while promoting clean energy, decent jobs, and sustainable use of resources. The conference has attracted many protests and parallel events, as diverse groups struggle to share the world stage and make their voices heard. Collected here are just a few of the scenes from Rio+20.

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  • Ricardo Moraes / Reuters

    Red Sludge From Brazilian Dam Collapse Reaches the Atlantic

    Earlier this month, on November 5, two dams retaining tons of iron-mining waste in Brazil burst, releasing a massive flood of toxic sludge that has flowed downstream into Rio Doce, spending two weeks making its way several hundred miles downstream, finally reaching the Atlantic Ocean.

  • AP

    Today in History: November 23

    A look at various events that took place on this day, November 23, photographed over the past century. Today’s collection includes a sword-fighting Mussolini, a motorcycle-jumping Evel Knievel, William Shatner dressed as a gun-toting Santa Claus, and much more.

  • Yannis Behrakis / Reuters

    Welcomed to Europe

    As politicians debate the status of refugees, volunteers are working tirelessly to provide them with basic care.

  • Steve McCurry

    Steve McCurry's India

    A new exhibit focuses on the famed photographer’s work on the subcontinent.

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