Pressure on North Korea ratcheted up amid nuclear test possibility

A U.S. guided-missile submarine arrived in South Korea Tuesday and envoys from the U.S., Japan and South Korea met in Tokyo as North Korea marked the anniversary of the founding of its military.Though experts thought a nuclear test or ballistic missile launch was possible around the anniversary, the morning came and went without either. South Korea's Yonhap news agency, citing a South Korean government source, reported that North Korea instead appeared to have held a major live-fire drill in the