Yeah. To understand why this is quite a flex: nearly no structure survives when they are directly hit with a nuclear weapon. The way hardened structures are des

Yeah. To understand why this is quite a flex: nearly no structure survives when they are directly hit with a nuclear weapon. The way hardened structures are designed is that the designers guestimate how big of a boom they have to survive and at what distance. They do this based on your intelligence sources of course. So let's say your spies are telling you that the enemy can deliver 60 kiloton device with 200m circular error probable (CEP). Then your engineers can calculate how likely is that your bunker/silo will survive that (and can do something like a counter attack.) And you build the number of silos you think you need based on that calculation. You put a lot of concrete and lot of work literally in the ground based on those numbers. And then suddenly your enemy just improves their guidance system and they drop (figuratively) such a video on you. That tends to cause jitters.