[Difwif]

Your fear about computer attacks appears to be a bit sensationalized and a typical knee jerk doomsday reaction. You parrot that "Electricity is the lifeblood of civilization" and that people will die when the power goes off but then seem to forget that blackouts already occur in highly populated areas. Are they a major annoyance? Of course! Do they cause mass death larger then asteroid impacts? Where did you get that idea? Many of our critical facilities have backup generators for a reason. If such an event did occur you'd be damn sure that any damage would be repaired ASAP.

[pyre]

I'm thinking that terrorists would have to do enough damage to warrant full replacement of a number (n = ?) of turbines at a number (m = ?) of plants to do significant, lasting damage in an area (you won't necessarily have a 'back-up turbine' lying around).