The funny part about a lot of the national security code at LLNL is that I bet there is approximately no one else on the planet with the computing resources to actually run it (HPC simulations of weapon effects) Except the few countries that possibility could are exactly the ones we wouldn't want to get their hands on it... funny how that works out.

Just remember, what was the actual reason ENIAC was created? It wasn't just for fun:

>its first program was a study of the feasibility of the thermonuclear weapon.

https://en.wikipedia.org/wiki/ENIAC