Donald Trump: “I want to commend Elon. I think he's got the credibility to do it; I know he does.”

Stephen's been with me from the beginning. He gets it, very good politically ... and he's a very good manager. He'll do a great job.

We're going to be paving the way for astronauts to plant the Stars and Stripes on the red planet.

They knocked out – they built a little bit of an anti-aircraft device and we knocked it out in about 15 minutes, maybe five.

Within the next two years, NASA will launch the first-ever nuclear-powered spacecraft to Mars.