The North Korean missile launch failed.
Various media are guessing that this might be because of a cyber attack by the US.
In my experience, when there's two possible explanations, one being conspiracy and the other being incompetence, the correct answer is usually incompetence.
In this case, launching a big rocket is not easy. That's why it's called "rocket science". I think it failed because it's really difficult to get this sort of thing right; there's a lot of systems and they all have to work correctly.