GCD is a nice library with an elegant API. Unfortunately it is not portable, because it requires a compiler which supports a non-standard extension to the C language.
The Antares 20E made its maiden flight in 2003. It is a self-launching glider with battery powered engine:
A wonderful glider. Sad it's so expensive (several 100k euros).
How ironic. You too fail to understand basic physics, because you don't seem to know that tons is not a unit of weight (neither does the editor/submitter).
The reference policy has a module for xscreensaver, and it's very tight - it doesn't allow network access.
That's the general problem when you concentrate a lot of energy in little space. There are practical differences between fossil fuel, hydrogen, urane and batteries, but the concept of accidentally releasing (converting to pressure/temperature) much of this energy is pretty much the same.