Korea's President Moon Jae-in is set to cross the heavily militarised border on Tuesday for his third summit with North Korean leader Kim Jong Un, seeking to cement a breakthrough in faltering nuclear talks between Pyongyang and Washington.
The inter-Korean summit will be a litmus test for another meeting Kim has recently proposed to US President Donald Trump, giving clues to whether Kim is serious about denuclearisation, a commitment he made at their first encounter in June.
Trump has asked Moon to be "chief negotiator" between himself and Kim, according to Moon's aides, after Trump cancelled a trip to Pyongyang by his secretary of state last month.