Critical Infrastructure Vulnerable to Cyber Attacks

The hacks of Sony Pictures, Target and Home Depot have made headlines around the world. But experts warn of a bigger cyber threat to our gas pipelines, electric substations, water supplies and transit networks. They say computer systems that control our critical infrastructure are vulnerable to cyber-attacks that could debilitate our way of life. Chief Investigative Reporter Tony Kovaleski reports in a story that aired on February 1, 2015.