North Korea’s leader Kim Jong Un and the South’s president Moon Jae-in will meet at the Military Demarcation Line that divides the peninsula before their summit Friday, Seoul said, in an occasion laden with symbolism. Moon will greet his visitor at the concrete blocks that mark the border between the two Koreas in the Demilitarized Zone, the chief of the South’s presidential secretariat Im Jong-seok said. When Kim steps over the line he will become the first North Korean leader to set foot in the South since the Korean War ended 65 years ago. The meeting will be only the third of its kind, following summits in Pyongyang in 2000 and 2007, and the high point so far of a rapid diplomatic rapprochement on the tension-wracked peninsula, ahead of a much-anticipated meeting between Kim and US President Donald Trump. The North’s nuclear arsenal will be high on the agenda. Pyongyang has made rapid progress in its weapons development under Kim, who inherited power from his father in 2011. Last year it carried out its sixth nuclear blast, by far its most powerful to date, and launched missiles capable of reaching the US mainland, sending tensions soaring as Kim and Trump traded personal insults and threats of war. Moon seized on the South’s Winter Olympics as an opportunity to try to broker dialogue between them. But Im played down expectations, saying that the North’s technological advances meant a deal would need to be “fundamentally different in nature from denuclearisation agreements reached in the 1990s and early 2000s”. “That’s what makes this summit all the more difficult,” he added. In the past, North Korean support for the “denuclearisation of the Korean peninsula” has been code for the removal of US troops from the South and the end of its nuclear umbrella over its security ally — prospects unthinkable in Washington. Trump has demanded the North give up its weapons, and Washington is pressing for it to do so in a complete, verifiable and irreversible way. Kim Hyun-wook, a professor at the Korea National Diplomatic Academy, told AFP that the issue was “not something that can be decided between the North and South”. “North Korea will want to see first what kind of offer it will get on regime security guarantees,” he said. “That will be discussed at the US-North Korea summit and it’s not easy to promise denuclearisation before any concrete talks on that.” In recent days Seoul has promoted the idea of a path towards a peace treaty to formally end the 1950-53 Korean War, which stopped with a ceasefire, but Im did not mention the issue. Reunions of families left divided by the conflict could also be discussed, and Moon has told Japanese Prime Minister Shinzo Abe that he would raise the emotive subject of Japanese citizens kidnapped by the North’s agents.