system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What's going on with Russia and is the US actually at DEFCON 3?
gpt
The United States is not at DEFCON 3. A quick google search showed this. 

What's going on with Russia is that Russia wants Ukraine, but can't just do a big invasion for fear of starting WW3. Other countries are warning Russia not to, but aren't doing anything besides economic sanctions (which are totally trashing the Russian economy) and saying that they support the government of Ukraine. This is for the same reason that Russia isn't giving a full military contribution, because nobody wants a full scale conflict, which is what Ukraine could quickly turn into. Nobody wants to directly fight the other, but they each want the other to collapse, which is why NATO is crushing Russia with sanctions.