Washington has repeatedly highlighted North Korea's proliferation of nuclear weapons and missile capabilities under President Kim Jong Un that poses threat to US interests.

North Korea may be poised to move into production its intercontinental ballistic missiles capable of reaching the US, the Pentagon’s commander of continental defenses told a Senate panel.

It’s bad enough that North Korea, an implacable enemy of the United States, has the nuclear bomb. To make matters worse, it has ICBMs that can reach the American mainland. But what few people except experts put much thought into is that all it takes is one well-placed explosion in space to disable the electronics