BLITZER: Shutting down the entire U.S. power grid with a single cyber- attack. The U.S. National Security Agency says China, China is capable of carrying that out. Our chief national security correspondent Jim Sciutto has more on the alarming revelation and it comes directly from the NSA chief, Admiral Michael Rogers.</s>JIM SCIUTTO, CNN CHIEF NATIONAL SECURITY CORRESPONDENT: Well, Wolf, Admiral Michael Rogers was not only very public with this warning, he was very specific in listing all the systems that he believes are vulnerable to cyber-attack, water utilities, power utilities, the nation's aviation system, as well as financial service companies. And he says that it's not a question of if an attack like this would happen, but when. And he says it would be of dramatic proportions. As you said, he identifies China, but he also said one or two other countries capable of carrying out such an attack and he did not identify them saying it is classified, and he said these countries, as well as non-state actors acting on their behalf, have carried out recon missions to test systems vulnerability. He says, "we see them attempting to steal information on how our systems are configured, the very schematics of most of our control systems, down to the engineering level of detail so they can look where there are vulnerabilities, how they are constructed and how I could get in and defeat them." Now, today, there was already an official reaction from China. China's foreign ministry spokesperson saying that China actually forbids such attacks and cracks down on such attacks, but from China -- between China and the U.S., this has been an ongoing issue not with just attacks on government systems but also the systems of private companies it attempts. Often successful to steal proprietary business information. It's a very serious issue with every legal of government, Wolf. And you can tell now from Admiral Rogers' comments that it is only becoming more acute. Wolf.
China's Ability to Attack U.S. Power Grid; China Could Cripple Power Grid