Kim pledged to work toward the "complete denuclearization of the Korean peninsula" during two meetings with Moon this year and at his summit with Trump, but talks on how to implement the vague commitments have since faltered.
Therefore, a peace treaty could easily be portrayed as a belated declaration of victory for North Korea in the Korean War. Their trip to the mountain on the North Korean-Chinese border, and the striking photo-op that will resonate in both Koreas, followed the announcement of wide-ranging agreements on Wednesday that they trumpeted as a major step toward peace.
North Korean leader Kim Jong-un has expressed his willingness to continue to take measures towards his country's denuclearisation, including the permanent dismantlement of the Yongbyon nuclear facilities, where a 5 MWe plutonium-producing reactor is located.
But there have been concerns in South Korea and the United States that ending the war would ultimately prompt China and Russian Federation, if not North Korea, to demand that the United Nations Command (UNC), which overlaps with U.S. forces in South Korea, be disbanded and leave. Moon, his wife, his cabinet and closest aides from the Blue House flew from Pyongyang Sunan International Airport to Samjiyon Airport in Ryanggang Province, where the mountain is located, on the South Korean presidential plane. -South Korea joint live-fire military exercise, at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, April 21, 2017.
But according to leaked USA intelligence findings published in July, North Korea has so far shown it does not intend to completely give up its nuclear programme. Dismantling it wouldn't reduce North Korea's atomic stockpile, thought to be enough for between 40 and 60 bombs, but it could help cap it.
"South and North Korea agreed on a denuclearisation plan for the first time. I now propose that we completely eliminate the hostility of the past 70 years and take a big step forward in peace so that we can become one again".
The North Koreans said they want both sides to take a series of simultaneous steps as a "shortcut" to a nuclear-free Korean Peninsula.
Moon said he will carry a private message from Kim for Trump when he meets the USA president in NY next week at a United Nations meeting.
Mr Moon was born in South Korea in 1953 during the Korean War.