So, I was thinking more about the fact that the air defenses should be destroying an incoming weapon before it's over the target, but yeah, on penetrative power, for this particular attack, it's even harder for Russia to make the case.

https://www.reuters.com/world/europe/ukraine-targets-western-russian-regions-with-drones-russian-officials-says-2024-09-18/

Dmitry Bulgakov, then a deputy defence minister, told RIA in 2018 that the facility could defend weapons from missiles and even a small nuclear attack. Bulgakov was arrested earlier this year on corruption charges, which he denies.

"It (the concrete facilities) ensures their reliable and safe storage, protects them from air and missile strikes and even from the damaging factors of a nuclear explosion," RIA quoted Bulgakov as saying at the time.

Like, if the Ministry of Defense is moving from "it can stand up to a nuke" to "falling Ukrainian drone debris blew the thing up", that's one heck of a shift.