How long before the U.S. is in range of a North Korean nuclear missile?

John Schilling
Aerospace engineer and consultant to 38North website, a North Korea focused website produced by the US-Korea Institute at Johns Hopkins School of Advanced International Studies.

2018 OR 2019

The Hwasong-14 test came somewhat sooner than expected but its relatively short range will need to be corrected and verified with future tests. Demonstrating accuracy and reliability, and training the operational missile crews, will also take some time. Given the progress demonstrated so far that will take a year or two and it will be a mobile and nuclear-capable ICBM from day one.