Foreign Governments Have Hacked U.S. Grid, NSA Head Says

Several 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 have left the U.S. vulnerable to a cyber-attack that will cause significant loss of life or physical damage one day, National Security Agency Director Admiral Michael Rogers told the House intelligence committee at a hearing in Washington today. Rogers said such an attack will occur during his tenure.