© SERGEI SUPINSKY/AFP via Getty Images A rescue worker sets flag signaling radioactivity in front of Chernobyl nuclear power plant during a drill organized by Ukraine's Emergency Ministry 08 November 2006. The catastrophe ranks as the world’s worst nuclear power plant accident. Russia countered Ukraine’s statement and said radiation levels were normal. “Radiation levels are normal in the NPP area. The NPP personnel continue to operate the power plant as usual and to monitor radiation levels,” Konashenkov added.
