Two hundred thousand feet up, things go horribly wrong. An experimental low-orbit spaceplane breaks up on reentry, falling to earth over a trail hundreds of miles long. And in its wake is the beginning of the most important mission in the history of spaceflight. Americans needs energy, and Dan Randolph is determined to give it to them. He dreams of an array of geosynchronous powersats, satellites that gather solar energy and beam it to generators...