(New York Times) — SEOUL, South Korea —
warned on Thursday that any military clash on a disputed maritime border could escalate into an attack on the presidential office in Seoul, threatening to engulf the South Korean leadership “in a sea of fire.”The threat came one day after South Korea conducted military drills near Yeonpyeong, a front-line island west of Seoul. The display of firepower was timed to mark the first anniversary of the North Korean artillery attack on Yeonpyeong, which killed two marines and two civilians.