I agree entirely with John Greenberg s assessment of the specious enthusiasm over the recent success of nuclear fusion: It is very far from a success, very far from commercial reality, and very expensive. I would add that it is also a concept that would require much greater concentration of generation capacity with very large transmission lines to get the power to where it was needed. The various alternatives currently under development solar, wind, hydro are broadly distributed, making it much less likely to result in a huge power outage in case of an attack or a natural disaster.