When I was OpsO for MWSS-271 prepping for our portion of an annual exercise in Norway I toured some of the caves. Nothing short of a direct nuke strike would affect the entrance, of which there are multitudes, most of which are quite well hidden.
As to the Nords storing stuff there, in just one of the caves I toured, the US, Britain, Germany and France all had at least one division's worth of equipment stored. Many of the odometers had less than 50 miles on them. I saw quad-cons stacked 5 high that were filled with medical, food, ammunition, POLs and other SL-3 gear. They were all rotated on a 5/10 year schedule to keep them viable.
The amount of equipment there was staggering.
That’s reassuring. Thanks.
L