system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why has the United States not invaded North Korea (in recent years), especially after having been threatened repeatedly?

I have a feeling it has to do with the Russians upstairs, or with the danger of repercussions in South Korea. But I feel a little ignorant on the topic (to say the least)
gpt
Because while N. Korea might talk a mean game, they're basically harmless. Much of what you see in terms of N. Korea is purely spectacle make to build this image that they are this badass. In reality, N. Korea probably wouldn't be able to take over a Walmart in Texas.

They're basically like a child who's threatening to hold his breath. Sure, he could do it but he'd only hurt himself.