 And so not only can you look at technology from an insider's viewpoint, as I do, I worked on fusion propulsion systems, for example, back in the early 60s. Fusion is what goes on in the stars. It's the most important source of energy in all our lives. If you use the right stuff in the right way and kick particles out the back end, they'd have 10 million times as much energy per particle as you can get in a dumb old chemical rocket.