Humans need to be able to deal with an austere environment that's isolated, with just a couple of other people, and understand… how you can work together as a team to get your objectives accomplished. …

We have to understand how to live out there, and what's required, and what you can get away with, and what you can leave behind and what you can't leave behind, and what makes the humans continue to work together as a team because if they don't work together as a team, then you're not going to get your job done. And you can't just project the answer to that question; you have to go out there and live it to get the answer.