It looks like the latest North Korea missile that was fired broke up on re-entry: http://www.cnn.com/2017/12/02/asia/north-korea-missile-re-entry/index.html This is not a minor point. The article also notes the need for the North Koreas to “master missile guidance and targeting” and the two-stage missile was at least partially liquid fueled, which takes time and can provide U.S. … Continue reading North Korean Missile Likely Broke Up on Re-Entry