The actual debugging only took me only one (long) day - plus an hour here and there but with no useful result. 10 months is just wallclock time, not user time ;-)

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:

http://www.lange-aviation.com/htm/english/products/antares_20e/antares_20E.html

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.