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My view is that by protecting the grid from a solar flare you are also protecting against an EMP attack so now the percentage is much higher. So the investment is cheap. I think NASA is not adding the other percent which is an EMP attack.

When you start adding all the different percentages of a small regional EMP attack or a center of the country EMP attack or any other terrorist grid attack then the numbers goes though the roof. They are not adding all the percentage of all the different type grid down problems.