on a more troubling matter, there is information that the chernobyl nuclear site in the ukraine was part of this world wide petya ransomware. chernobyl was, of course, the side of the 1986 nuclear explosion in what was then the soviet union. but the disaster site is still in the process of being cleaned up and remains very dangerous. we are told the hack affected the electronic sensors that monitor radiation levels. for now, those levels are being taken manually. all work at chernobyl has stopped, but there is no radiation threat. experts say power grid systems with old computer technology are among the vulnerable targets. watch. the attack that we see right now it s just the beginning of a wave of attacks, and in the future, on systems that are weat backdoors. the backdoors, as he says. the key to close those factors