"It has so much capability, so much more capability than any other vehicle, that I think we can start to contemplate missions like a Mars sample return, which requires a tremendous amount of lift capability because you've got to send a lander to Mars that still has enough propellant to return to Earth."

VOA: special.2011.04.11

There's just a tremendous amount of things. Fortunately,Elvis didn't throw away a whole lot of stuff,so here we are, and there are tens of thousands of items of his that are out there."

VOA: standard.2010.01.07