That little guy just doesn't know when to quit. Still no one is invading North Korea. The US isn't there to "free" the people. Maybe they do not have enough oil or natural resources in order for them to qualify for freedom.
This is wrong!
They already had a war influenced by US. This Korean war divided country on half on democratic and communist.
( Whole world was divided once.)
They are ready because they know what will happen to them for their opposition to US.