SEOUL (Reuters) - North Korea conducted a big live-fire exercise on Tuesday to mark the foundation of its military and a U.S. submarine docked in South Korea in a show of force amid growing concern over the North's nuclear and missile programmes.
The port call by the USS Michigan, which is designed to carry ballistic missiles and cruise missiles, came as a U.S. aircraft carrier strike group steamed towards Korean waters in an effort to deter North Korea from a sixth nuclear test or more missile launches in defiance of U.N. sanctions.