South Korean President Moon Jae-In and North Korean leader Kim Jong-Un hugging each other after their second summit in the North Korean side of the demilitarised zone. Blue House handout / EPA
South Korean President Moon Jae-In and North Korean leader Kim Jong-Un hugging each other after their second summit in the North Korean side of the demilitarised zone. Blue House handout / EPA

North Korea top aide lands in Singapore as summit preparations advance