An official website for the country said America “should be acutely aware” that the United States mainland is within reach of their missiles but not everyone agrees.
Military intelligence is not convinced North Korea has an intercontinental ballistic missile ready yet but they may be close.
Parts of a test rocket launched in December were found in areas that suggest the West Coast of America may be within range soon.
The North Korean capital city of Pyongyang is also very upset with joint military exercises planned between the US and South Korea.
Official news sources in North Korea calls the situation there "an inch away from explosion."