What lessons from earlier efforts are being applied to, to the work we're doing today?

Yeah.

So, uh, so there's several actually.

Uh, if you go back even, although, I mean, we've been talking about doing nuclear propulsion and power since the 1950s, you know, seriously.

From that time forward, we've had a lot of things we've learned, a lot of challenges, uh, that we've encountered.

How do you develop these materials? These materials are, uh, different than what you would have in a terrestrial reactor, and so we've had to figure out how do those materials behave in this environment? How do they behave under these conditions? The reactor for space runs a lot hotter Than it does for a terrestrial nuclear reactor.

And there's reasons for that.

Do you do these tests also with, uh, in collaboration with Department of Energy and other organizations?