At 1:23 AM on April 26, 1986 the Chernobyl Nuclear Power Plant operators committed a fatal series of errors here in the control room of Reactor #4, triggering a meltdown and an explosion that resulted in the world's largest nuclear accident to date.
12 October 1991: Few people know that there was a second explosion at the Chernobyl nuclear power station on 11 October, 1991 in the turbine hall of reactor 2. Liquidator friends contacted Kostin, who immediately visited the site accompanied by his wife, Alla, who, too worried to stay at home, spent the whole night at a control post as she was not authorised to enter. The roof was blown off but, fortunately, there was no radioactive leak. Photograph: Igor Kostin/Corbis