South Korea's president convened an emergency meeting of his cabinet to prepare for possible changes in North Korea. Kim's death would create huge uncertainty over leadership in a country whose deep distrust of the outside world is backed by a 1.2 million-troop-strong army and possibly atomic weapons. In a separate later development South Korean officials on Thursday declined to comment on media reports that North Korea was completing a new missle test site capable of launching long-range ballistic missiles.