This is the cyber warfare Jim Webb was talking about

[Commentary] Jim Webb said during Oct 13's Democratic debate that the greatest "day to day" national security threat is cyberwarfare. Whether cyberwarfare is the single largest threat to the United States, or merely among the biggest, is besides the point. What matters is that Webb was the only presidential candidate to even mention cybersecurity, a subject that deserves more attention. America's top intelligence officials testified before Congress in September that cyberattacks are growing more severe, and the country doesn't have sufficient protections in place to prevent a serious cyber catastrophe. That doomsday scenario involves a foreign country attacking the electrical grid, shutting off power across the country. Or perhaps it's an attack on the computer systems controlling stock trading. An attack on command and control centers for nuclear facilities might even be possible. Luckily, catastrophic cyberattacks remain unlikely, according to US national intelligence director James Clapper. But he has warned that serious cyberattacks aren't some remote threat -- they're happening today.