Last I checked your vote is worth 2.65$ I figured that out because you up voted your own comment 😄 It is obvious the sentient AI nano bots will break into medical labs to steal ebola viruses, and ride them like ponies into our lungs, while simultaneously hacking the nuclear codes to set them all off at once. Even if a few crash mid air, it wouldn't be the end of the world... Just the end of humanity. Nuclear winter seem so like a long time, but if the dinosaurs nuked themselves to death, the evidence would have disappeared millions of years ago.