South Koreans are anxiously waiting to see if North Korea will make good on its threat to take military action in response to an artillery drill on Yeonpyeong Island. The exercise came just hours after an emergency meeting of the United Nations Security Council failed to ease tensions, and after an American politician said North Korea is willing to accept nuclear inspections. South Korea defied diplomatic pressure and went ahead yesterday with firing artillery into the Yellow Sea for 94 minutes, escalating its confrontation with the communist North. Defence officials stress the shelling was to the southwest, away from North Korea. But North Korea claims that area is its territory and, in the days since the drill was announced, has warned it could lead to war. A few hours before the exercise, the United Nations Security Council failed to reach a consensus on lowering tensions on the Korean peninsula.