forgot "with significant payload"Impossible is such a *very* harsh mistress term to use - if you could get a bored multibillionaire that's not already distracted by any number of other quixotic fool's errands interested in such a glittery thing, they just *might* pull it off as a pure one night launch record stunt. The real point is whether it would make any more sense than any other alternative ETO solution(s), which it *most* likely wouldn't.