 At this point, it seems like it's just a lot more expensive to do something that SpaceX has already done years ago and for which there's not much of a market. And the rather embarrassing prospect that it might be SpaceX who has to take the two astronauts back if they can't get the capsule working again. Joey, we'll have to leave it there. But thank you very much indeed for joining us. Joey Roulette, who's a business of space correspondent for Reuters. You're listening to NewsHour from the BBC World Service.