He would later insist that it was the explosion of Reactor Number Four—and not his own bungled reforms—that proved the catalyst in the destruction of the Union he had so desperately wished to preserve. In April 2006, he wrote: “The nuclear meltdown at Chernobyl twenty years ago this month, even more than my launch of perestroika, was perhaps the real cause of the collapse of the Soviet Union five years later. Indeed, the Chernobyl catastrophe was an historic turning point: there was the era before the disaster, and there is the very different era that has followed.”