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An abandoned middle school decays.

An abandoned middle school, part of the contaminated area surrounding the Chernobyl Nuclear Power Plant, in Pripyat, Ukraine, March 17, 2011. The ghost town which once had a population of about 50,000 people, was given a few hours to evacuate in April 1986 as radiation streamed into populated areas after an explosion at the reactor. (Joseph Sywenkyj/The New York Times) -- MAGS OUT/NO SALES --

Chernobyl today

Ukraine will mark the 27th anniversary of the Chernobyl disaster, the world's worst civil nuclear accident, on April 26. A look at life inside the exclusion zone today.