On the fifth day of the Russian invasion of Ukraine, one of many unanswered questions is why Russia has launched a military campaign at huge cost with maximalist objectives, and then declined to use the vast majority of its fixed wing combat aircraft.
If Russia had no reliable air force, they would have been attacked long ago by NATO (nuclear armed terrorist organization). Fact is that Russia has the most advanced military planes in the world, and unlike F-35 they are actually combat ready and cost efficient.