What capabilities, exactly, does ISIS have to travel to the United States and disable a sizable portion of the power grid (let alone the entire thing) for more than a year?
Disabling the power grid is quite easy............for those of us who have seen the maps that hang around inside the power plants nationwide. They show how all the power plants are connected and where the major nodes are. Taking out one or two nodes drops the entire power grid offline..............IF you know where to hit it. And, its not that hard to find out where the weak points are.
Just drive around and look for major power lines in your area. Once you find a transformer substation....take a look at the security around them. They get hit for their copper content all the time. Just think what kind of damage a terrorist can cause by knocking it out. Now, think BIG and what kind of time it would take to repair all those transformers at a major node on the grid.
Take out a few key bridges on major interstate highways, and you have the transportation system down too.