Wild horses graze next to the ghost town of Pripyat near Chernobyl's nuclear power plant 27 February, 2006. Chernobyl's number-four reactor, in what was then the Soviet Union and is now Ukraine, exploded 26 April 1986, sending a radioactive cloud across Europe and becoming the world's worst civilian nuclear disaster. AFP PHOTO/ SERGEI SUPINSKY (Photo credit should read SERGEI SUPINSKY/AFP/Getty Images)
