But even if he was super-careful about ensuring that restricted information wasn't shared with the new company, I'm sure his political enemies would find ways to have him locked up if he tried that...
Sure you can. Russia has blown up multiple experimental nuclear-powered cruise missiles in the last few years [0,1]. It's a political question of tradeoffs, of how much you value technological progress.
America hasn't blown up any atmospheric nuclear reactors in this century. America is also unlikely to learn how to build aerospace nuclear reactors in this century.
[0] https://en.wikipedia.org/wiki/Nyonoksa_radiation_accident
[1] https://news.ycombinator.com/item?id=16509396 ("U.S. Has Been Watching Russia's Nuclear-Powered Cruise Missiles Crash and Burn (thedrive.com)")
Why should it? It already knows. Since last century:
https://en.wikipedia.org/wiki/Project_Pluto
In a place called 'Jackass Flats', of all things...(Giggle)
Edit: Or take the https://en.wikipedia.org/wiki/NERVA mentioned here by credit_guy: https://news.ycombinator.com/item?id=38136383
Same place, name is program :-)
Because as I’m sure you know and can see where I’m going with this, you’re already living under an enormous amount of lethal radiation, you and everyone else has been for their entire lives… its called the van allen belts.
Then again, it's looking like the whole 'fail fast' approach is over anyway, with Starship grounded by red tape.
A full-stack Starship failure is seemingly too big/dramatic/risky to get away with doing repeatedly, especially admidst the politics of Twitter/X.