Ukrainian Drone Attacks Hit Russian Air Bases Deep Inside Russian Territories

Russian missiles pounded Ukrainian energy infrastructure, worsening the already dire situation for millions of Ukrainian civilians who are without power and heat in freezing temperatures. Russia didn't start launching these large scale attacks on Ukrainian energy infrastructure until October. So you see how Russia responds to those attacks with big escalations, huge escalations. But if they're going to escalate, what's the next step? I mean, what is the next level here?