you mention virgin galactic, blue origin, they are looking at suborbital spaceflight, not just for science, but also tourism. the more people we can get exposed to space, the better. ultimately, when those capabilities become commercialized, it results in a market that enables nasa to buy those services as well, and nasa becomes one customer of many customers, driving down our costs, increasing our access, and we can use taxpayer resources to do things that commercial is yet doing. all that in my view is good. >> you mentioned boeing is using the vehicle from united launch alliance powered by a russian engine. i believe russia has made recent statements indicating they make up the supply of that engine. -- they may cut the supply of that engine. does that concern you that my cause further delays? jim: yes, the usa is working hard to not be dependent on the rd-180 engine. it is also true, and i want to be clear about this, nasa is unique from the rest of the federal government in the sense that when relations get rough between countries and they are not so good, nasa is able to maintain tha