Russia’s answer to the question of whether Ukraine went rogue when attacking its early warning system(s) or if this was done at America’s behest will determine its response to any conventional NATO intervention in Ukraine. The first could see Russia wait until a large-scale force crosses the Dnieper to use tactical nukes, while the second might push it to launch a nuclear first strike against the US before that intervention begins so as to preempt the nuclear first strike that Russia might believe the US is planning.

https://www.zerohedge.com/geopolitical/ukraine-going-rogue-or-did-it-attack-russias-early-warning-systems-american-approval