Fox News: Lawmakers push to protect electric grid after report on attack Even if it wasn't a terrorist attack, the methodology of the gunmen was scary enough to raise questions about how vulnerable the grid really is. Two gunmen went under a highway through a power culvert, cut fiber optic cables carrying phone and Internet service, then fired over a hundred rounds into transformers and other equipment that caused $16 million damage. But short of putting armed guards at every substation, I'm at a loss to understand how they're going to improve security. If a terrorist finds the right substation, an attack like that could bring down the grid across multiple states. It's impossible.