On April 26, 1986, the world's worst nuclear disaster occurs at the Chernobyl power plant in the Soviet Union.
Quote Of The Day
"At 1.24 am on 26 April 1986 Chernobyl's Unit 4 reactor exploded after staff disabled safety systems and performed an ill-advised experiment to check (ironically enough) the reactor's safety." Mark Lynas
Image Of The Day

Chernobyl, several months after the disaster. By IAEA Imagebank - 02790015, CC BY-SA 2.0, https://commons.wikimedia.org