North Korea successfully launched a solid-fuel Hwasong-18 intercontinental ballistic missile in December, its third consecutive successful test of the long-range nuclear weapon that may be able to strike the U.S. mainland.

Kim Jong Un was present at the launch and told military officials and scientists who worked on the ICBM that he wouldn’t hesitate to nuke the U.S. if provoked — an increasingly low bar based on other recent statements put out by Pyongyang. The U.S., South Korea and others condemned the test, but the United Nations Security Council once again failed to agree