Jim Bridenstine: “While some of these alternative vehicles could work, none was capable of achieving our goals in orbit around the moon…”

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.

I think at this point we are in good shape.

The more launches, the more one of them could have, you know, a problem.

When we use different types of rockets, we have dissimilar redundancy.