[Brett66]

Opening up Mars should require opening up the minds of the planners.

That's harder than developing a new system, IMO.

[techcor]

Must be lunch, suddenly everyone's posting. Shouldn't have whined about not getting any.

gas-core nuclear propulsion

Excellent! That's the sort of thing I wanted to see in the replies. Any more info on those? As for the "Greens"... they are exactly why I'm trying to tie in the power from nuclear waste part.