Chinese and Russian hackers are attempting to seed viruses in the US power grid that could one day plunge major cities into chaos, a report warned Wednesday. The report in the Wall Street Journal quotes intelligence officials saying that cyber-spies last year repeatedly gained access to the system powering everything from financial institutions to sewage systems. "The Chinese have attempted ...

Cyber attacks pose the greatest threat to the United States after nuclear war and weapons of mass destruction -- and they are increasingly hard to prevent, FBI experts said Tuesday. Shawn Henry, assistant director of the FBI's cyber division, told a conference in New York that computer attacks pose the biggest risk "from a national security perspective, other than a ...