> as they learn how to build and operate a tunnel system like this. Yes, why do they even do that. Not that they are never any improvements, but this pretty m

> as they learn how to build and operate a tunnel system like this. Yes, why do they even do that. Not that they are never any improvements, but this pretty much a solved problem. They have a stupid amount of NIH syndrome, but apply that to the physical world and that always results in fatalities.