FLATOW: There has been a lot of fanfare about Dragon being the first private craft to make it to the space station. But in the history of space flight, aren't - doesn't NASA farm out all the rocket ships and things like that, anyhow? What makes this so different? I mean, you know, I'm thinking of Lockheed, Martin Marietta - all of these companies back in history of space travel. They were there. They built the stuff. What makes this different?
MOSKOWITZ: The distinction is a lot more subtle than a lot of people make it out to be. Basically, in the past, NASA would buy a rocket or a spacecraft from a company like Northrop Grumman.
MOSKOWITZ: Now, they buy services. The company retains ownership of the vehicle. So it's just almost the technicality, but it does have different repercussions for how much control NASA has.