No nukes first.

Combs, Mike wrote:
> None of them can use liquefied O2 as reaction mass, and when we start
>processing space materials, we'll have more of that than any other
>single element.

Probably true. However, the Russian Hall effect thruster apparently runs
on 95% oxygen, but they need the final 5% to be something non oxidising
to run the discharge side.

> Regards,
>
> Mike Combs

--
- Ian Woollard (ian.woollard@...)

"Is a planetary surface the right place for an expanding technological
civilization?"
- Gerard O'Neill