North Korea has fired an unidentified projectile off its east coast, Seoul’s military said on Monday. “North Korea fires unidentified projectile into the East Sea,” the Joint Chiefs of Staff said in a brief statement, referring to the body of water also known as the Sea of Japan. The launch followed Pyongyang’s test-firing of a ballistic missile earlier this month that it said incorporated artificial intelligence technology. That missile, fired on October 3, “is capable of changing its flight...