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IIRC you're talking on the order of several hundred nuclear bombs for a single interstellar trip, i.e. a significant fraction of the current US warhead supply, but by no means the whole lot.

I think intersteller travel at sensible speeds would require rather more energy than that - the relevant Wikipedia page gives estimates (depending on the approach used) of 30 million to 300 thousand 1MT bombs which is, fortunately, a few orders of magnitude larger than any nuclear arsenal:

http://en.wikipedia.org/wiki/Project_Orion_%28nuclear_propul...

> requires no unproven technology

what will you make the pusher plate out of?

>a lot of black politics

FTFY