April 26 marks the 40th anniversary of the explosion at Reactor 4 of the Chernobyl nuclear power plant in Ukraine. The accident caused the largest ever release of radioactive material into the environment,

The nuclear incident at Chernobyl spread radiation across Europe and led to political changes that played a role in the collapse of the Soviet Union.

April marks the 40th anniversary of the Chernobyl nuclear power plant disaster. Find out more about what happened and the effects of the explosion here.

Three books on the tragedy provide a detailed understanding on what transpired, drawing on Soviet archives, KGB documents, interviews, and testimonies by survivors

Can we ever really understand Chernobyl? These five shows and videogames give a pretty good glimpse of what the disaster entailed.

Add Yahoo as a preferred source to see more of our stories on Google. Drone damage to the protective shield around a reactor at the Chernobyl nuclear power plant in Ukraine has rendered it unable to do its main safety function, a nuclear watchdog said.