SEOUL, South Korea — North Korea added to its recent barrage of weapons demonstrations by launching four ballistic missiles into the sea on Saturday, as the United States sent two supersonic bombers streaking over South Korea in a dueling display of military might that underscored rising tensions in the region.
South Korea's Joint Chiefs of Staff said that the four short-range missiles fired from a western coastal area around noon flew about 130 kilometers (80 miles) toward the country's western sea.
