North Korea perfecting ICBM capable to deliver a nuclear weapon anywhere in the United States, driving US to enhance its Ground-Based Midcourse Missile Defense (GMD)

Throughout 2017, North Korea tested several missiles demonstrating the rapid advances in its military technology. The Hwasong-12 was thought to be able to reach as far as 4,500km (2,800 miles), putting US military bases on the Pacific island of Guam well within striking distance.