Re:Columbia

I heard Bush say that the space program will continue, although I imagine it will be some time before the Shuttle program get’s going again.
This is no time for recriminations, but I was very surprised too learn that this Shuttle is the very same Columbia that was first launched in 1981, 20 years seems like a long time for what is one of the most sophisticated aircraft/space vehicle around. I would’ve have thought that Shuttle’s would be retired after 8-10 years service, especially when you consider the forces these craft are hit with during the launch, spaceflight and re-entry.
I think with Ion engines now being developed, it might be time to strap one on too a new kinda shuttle, give it a short burst and it should be able to break out of the atmosphere without the use of traditional and somewhat unreliable chemical rockets.
ADM