There is nothing in this world so permanent as a temporary emergency. - Robert A. Heinlein

Young Daniel Shipstone saw at once that the problem was not a shortage of energy but lay in the transporting of energy. Energy is everywhere—in sunlight, in wind, in mountain streams, in temperature gradients of all sorts wherever found, in coal, in fossil oil, in radioactive ores, in green growing things. Especially in ocean depths and in outer space energy is free for the taking in amounts lavish beyond all human comprehension.
Those who spoke of “energy scarcity” and of “conserving energy” simply did not understand the situation. The sky was “raining soup”; what was needed was a bucket in which to carry it.

There is one thing no head of a country can know, and that is: how good is his intelligence system? He finds out only by having it fail him.

A second sun blazed white and swelled visibly as he watched. What on Earth would have been—so many times had been—a climbing mushroom cloud was here in open space a perfect geometrical sphere, growing unbelievably. It swelled still larger, dropping from limelight white to to silvery violet, became blotched with purple, red and flame. And still it grew, until it blanked out the earth beyond it.
At the time it had been transformed into a radioactive cosmic cloud Circum-Terra had been passing over, or opposite, the North Atlantic; the swollen incandescent cloud was visible to most of the habitable portions of the globe, a burning symbol in the sky.