Report: N.Korea Says Explosion Was Planned SEOUL, South Korea - North Korea said Monday that a huge cloud caused by an explosion near its border with China several days ago was the planned demolition of a mountain for a hydroelectric project, British media reported.    North Korean Foreign Minister Paek Nam Sun said the blast was intentional, responding to a request for information from British Foreign Office minister Bill Rammell, who is visiting the North, the British Broadcasting Corp...