we take for granted all the materials. all of those things exist, and there is a robust program in space exploration about how do we ensure that the benefits -- the things that we learned, that space technologies come to us here on earth. and so i think we have to separate out this particular tourist ride from what space exploration has done and still has the potential to do even more. >> what an important distinction, as we see the astronauts climbing up those stairs, heading up to the capsule. tom costello, talk to me about the actual rocket that they're going to be sitting on top of. >> yeah, the "new shepard" rocket, named after alan shepard, the first american to go into space. that rocket is 60 feet tall. it has about 110,000 pounds of thrust. it's going to be -- it's a liquid hydrogen/liquid oxygen rocket. what does that mean?