@fedya
Accidents happen. bridges fall down in the night, earthquake prone country you know, cliff faces tumble. I’m not talking about conventional airpower here, at least not unless things get much worse. Still if Ivan can be convinced that he best get his exposed ass back over the mountains all the better. Arranging a collapse on the tunnel without fingerprints may be trickier. I gather that these two narrow choke points are all that supplies the Russian army. They do not have the sustainability for force projection that the US has. No one else does anymore.