Although North Korea recently agreed to freeze its nuclear program, its Deputy Commander Li Gum-chol has since threatened, "We will turn Seoul into a sea of flames by our strong and cruel artillery firepower, which cannot be compared to our artillery shelling on Yeonpyeong Island. We are training hard, concentrating on revenge to shock [South Korean President] Lee Myung-bak's traitorous group and the military warmongers in South Korea."