US, South Korea Bolster Coordination as Pyongyang Expands Nuclear Program

Seoul says North Korea is still producing material for new weapons.

South Korean President Lee Jae Myung speaks during a press conference in Seoul, South Korea, on June 8, 2026. Chung Sung-Jun/Getty Images

U.S. and South Korean officials met in Seoul on June 11 to strengthen nuclear deterrence and military readiness as North Korea expands its nuclear weapons program and increases production of weapons-grade nuclear material.

The discussions were part of the sixth meeting of the Republic of Korea–U.S. Nuclear Consultative Group (NCG).