North Korea fires ballistic missile, says South Korean military

North Korea fired a ballistic missile on Sunday, Seoul's military said, just days after a United States aircraft carrier arrived for joint drills with the South in a show of force against Pyongyang. South Korea had earlier detected signs the North was preparing to fire a submarine-launched ballistic missile (SLBM), the president's office said on Saturday - a weapon Pyongyang last tested in May. The Sunday launch is the latest in a record-breaking blitz of weapons tests by nuclear-armed Pyongyang this year, including firing an intercontinental ballistic missile at full range. In May, the North test-fired a short range ballistic…