South Korean President Lee Jae Myung proposed talks with North Korea to formally end the long-running Korean war, as Pyongyang deepens ties with Russia while asserting its status as an “irreversible” nuclear state. The two Koreas remain technically at war because their 1950-53 conflict, triggered by a North Korean attack, ended with an armistice rather than a peace treaty. Lee made the proposal in his speech at a ceremony marking the anniversary of Korea’s liberation from Japan’s 1910–45...