Senator Mark Kelly

Well, that's the thing about probabilistic risk assessment.

Yeah.

is when you're not doing a lot of them, you don't really know what the risk is, especially not until you start having some problems.

But without the repetition, you don't have the problems.

So the risk is still very uncertain.

We were okay with the known unknowns.

Yes.

The unknown unknowns.

Those are the ones that keep you up at night.

Yes.

And so you're always like mapping this stuff out, like, you know, the probability of it happening and the risk, like, is it, you know, is it catastrophic?

You know, so you try to then, you always got to focus in the, in the very likely and catastrophic, you know, quarter of the box, right?

Yeah.

You know, the unlikely uneventful stuff, you can, you know, sort of let that go.

Um, but even the unlikely catastrophic, you had a focus there because of the consequences.

In the space shuttle, we train a lot, thousands of hours.

I have about 6,000 hours of flight time, I think.

I stopped counting at some point.

I probably have as much time in the space shuttle simulator.

We just spend a ton of time over, for me, over 15 years practicing almost every possible scenario of multiple malfunctions in different systems and in the space shuttle because of the required redundancy to make sure system failure doesn't kill you.