4 trends tracked about this subject — the full history, oldest to newest below.
Former President Trump has ordered a reduction in military exercises with South Korea following a dispute over Iran's denuclearization efforts.
Diplomatic activity intensifies as the United States and Iran engage in indirect talks in Doha following recent mutual attacks.
North Korea has formally rejected denuclearization goals, declaring its nuclear arsenal non-negotiable ahead of a high-profile visit from China's Xi Jinping.
North Korea declares end to denuclearization talks as China’s Xi visits Pyongyang amid shifting regional dynamics