Yet. so, it was decided that these commercial operations would self-certify, if you will, to a degree. and also, of course, the participants would have to sign informed consent. so, there's some similarities, but it's very different also. there is at least some regulation on the space flight side. >> you could get folks to sign anything. they could sign away liability if they want to take those risks, i suppose. and you'll hear from the folks who do deep underwater stuff and folk who is do space stuff, it's not just about the tourism, adventure. it's also about science, et cetera. i wonder for...