U.S. Deputy Secretary of State Wendy Sherman met with her counterparts from South Korea and Japan on Wednesday, emphasizing the U.S. commitment to defend its allies and trilateral security cooperation to confront an accelerating nuclear threat from North Korea.
The latest top-level meetings between the countries came as North Korea apparently presses ahead with preparations for its first nuclear test explosion in nearly five years, which U.S. officials say could occur in the coming days.
