From the Overview: "North Korea continues to advance its nuclear weapons and missile programs despite UN Security Council sanctions and high-level diplomatic efforts. North Korea is observing a self-imposed moratorium on nuclear and long-range missile testing. Recent ballistic missile tests and an October 2020 military parade suggest that North Korea is continuing to build a nuclear warfighting capability designed to evade regional ballistic missile defenses. Such an approach likely reinforces a deterrence and coercive diplomacy strategy--lending more credibility as it demonstrates capability--but it also raises questions about crisis stability and escalation control. Congress may choose to examine U.S. policy in light of these advances."
CRS In Focus, IF10472
Congressional Research Service: https://crsreports.congress.gov/