Jim Bridenstine: “I am deeply troubled by the Obama administration's last-minute concessions to Iran on lifting the conventional weapons…”

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.

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.

Having a Gateway in orbit around the Moon is important for a lot of reasons.

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