North Korea has recently moved a ballistic missile to its east coast in a seeming show of strength or in readiness for a launch, sources told Seoul-based Yonhap News Agency Thursday. The United States said Wednesday it had moved advanced missile defence and radar systems to its base on the Pacific island of Guam, dpa reported. Pyongyang's relocation of the intermediate-range missile, whose range puts the island in its reach, is seen as a response to the US move, Yonhap reported.