President Biden and South Korean President Yoon Suk-yeol will sign a declaration on nuclear coordination during Yoon's visit to Washington this week in response to "provocations" from North Korea, senior U.S. officials briefed reporters.
Why it matters: North Korea's nuclear breakthroughs and unprecedented increase in missile testing have inflamed debate in South Korea about whether the country can still entrust its security to its nuclear-armed ally in Washington. In the new "Washington Declaration," Biden will announce new measures to coordinate with Seoul and deter Pyongyang, while Yoon will re-commit to non-proliferation.
