Seoul's national security adviser, Chung Eui-yong (Phôt: VNA)

Chung Eui-yong said that the denuclearization process of the Korean Peninsula has begun to enter an irreversible phase. Chung's remarks come amid an apparent tug of war between Washington and Pyongyang over when the U.S. should begin providing benefits to the communist North for its denuclearization measures.