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North Korea after decades of effort has a missile potentially capable of reaching the continental United States, but analysts say Pyongyang has yet to show the ICBM can inflict serious damage once it gets there.

U.S. and South Korean experts on Tuesday said Japanese video footage capturing the Hwasong-14's re-entry vehicle shortly before it crashed into the sea suggests it failed to survive the extreme heat and pressure after re-entering the Earth's atmosphere following its launch from northern North Korea on Friday.

Analysts say the North will likely conduct more flight tests of the Hwasong-14 missile to obtain a successful re-entry vehicle, which is needed to return a warhead to the atmosphere from space so it can hit its intended target.