A combination of images, taken in 1982 and on March 31, 2011 (bottom), shows the before and after view of the abandoned city of Prypiat near the Chernobyl nuclear power plant. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Vladimir Repik and Gleb Garanich (UKRAINE - Tags: ANNIVERSARY DISASTER ENERGY ENVIRONMENT)