San Antonio Express-NewsForeign Governments Have Hacked US Power System, NSA Head SaysBusinessweekSeveral foreign governments have hacked into U.S. energy, water and fuel distribution systems and might damage essential services, the top national security official said. Those intrusions could leave the U.S. vulnerable to a cyber-attack that may cause ...NSA director: China can damage US power gridSan Antonio Express-Newsall 17 news articles »