On April 26th, 1986, the world's worst nuclear power plant accident occurs at the Chernobyl nuclear power station in the Soviet Union. Thirty-two people died and dozens more suffered radiation burns in the opening days of the crisis, but only after Swedish authorities reported the fallout did Soviet authorities reluctantly admit that an accident had occurred.
The radiation that escaped into the atmosphere, which was several times that produced by the atomic bombs dropped on Hiroshima and Nagasaki, was spread by the wind over Northern and Eastern Europe, contaminating millions of acres of forest and farmland. An estimated 5,000 Soviet citizens eventually died from cancer and other radiation-induced illnesses caused by their exposure to the Chernobyl radiation, and millions more had their health adversely affected. In 2000, the last working reactors at Chernobyl were shut down and the plant was officially closed.
Here's a great read about the aftermath:
http://www.kiddofspeed.com/