China and North Korea are restoring a direct rail link between their capitals after a six-year pause, a move that reflects warming ties between the two countries.

North Korea launched a series of missile tests as the country threatened a response to joint U.S.-South Korean military drills in the region. North Korean leader Kim Jong Un watched on with his teenage daughter,

South Korea’s president said this week that some U.S. air defense systems stationed on the Korean peninsula could be deployed overseas as the United States’ war with Iran intensifies, a move that high...