I'm just curious as to whether it was Ukraine or the US who carried out those strikes in Russia?
Russia has excellent radar and air defense systems, so an air base being struck 400km within their territory and nobody knows who did it raises an eyebrow for me. Not to mention, Ukraine isn't known to possess this type of technology / weaponary. Who knows, maybe the US is testing out their new B21 stealth bomber.
https://www.youtube.com/watch?v=0uLrGT-gfOI
Only problem with that though is if it was the US, they wouldn't have managed to just get a couple planes, and instead there wouldn't be an airbase there anymore.