Jim Bridenstine: “The proposed changes to NAAQS for ozone are unwarranted at this time.”

NASA is doing a lot of things, I think, rightly, that are accelerating processes.

Here's what we know: China is not going to slow down. That means that we, as a country, need to come together, figure out what the architecture is, be committed to a process and then move forward as rapidly as possible.

If we are putting American astronauts on those vehicles, without question, it is not just up to them, it is up to us as well.

The only rocket that is going to be available to take humans by 2024 is the SLS rocket with the Orion crew capsule.