Bracing for a Big Power Grid Attack: ‘One is too Many’

Part of the nation’s power grid is struck by a cyber or physical attack nearly once every four days. Some experts fear the rash of smaller-scale incidents may point to broader security problems with potentially devastating consequences.

http://www.usatoday.com/story/news/2015/03/24/power-grid-physical-and-cyber-attacks-concern-security-experts/24892471/