ric grid. >>> you're watching "inside story" on al jazeera america. i'm ray suarez, we have been looking at the trick grid. you heard about antick waited equipment. let's look at security threats to the grid. "al jazeera america"s jamie mcintyre joins us from the pentagon. during the cold war we were told the threat to the grid was from an atomic weapon, is the thinking about the vulnerability shifted. >> it has. we here warning of an electronic pearl harbor, a cyber attack that could not just affect the electrical grid but water supply and in a way the new era was ushered in by the united states and israel, where experts agree that those two countries introduced the stuxnet virus disarming iranian centrifuges, it's where you have a cyber weapon, a line of complicated computer code that can inflict physical damage. if the u.s. and israel can do it. others can do it too >>> so does the defense department war game around, strategise around attacks to infrastructure. >> yes, they do. last week the commander - the u.s. northern commander based in colorado

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