"My father would be extremely delighted if they take steps to realise a permanent peace regime, an opportunity he missed by a hair's breadth", said Kim Hong-gul, his youngest son who now heads the Korean Council for Reconciliation and Cooperation, a coalition of about 200 civic groups working on inter-Korean peace.
"That would complete his lifetime mission".
Trump and Kim landed in a city teeming with media and onlookers of all stripes, from foreign policy analysts like Kelly and Enos to former basketball star Dennis Rodman, who claims to be a friend of the two leaders.
The US president flew in on board Air Force One on Sunday, arriving from Canada where a G7 summit ended in a war of words over trade between Mr Trump and his allies.
South Korean President Moon Jae-in, a supporter of the Sunshine policy, has made a fresh effort at detente since he was voted to power in May past year. He has held his own two summits with Kim Jong Un, in April and May.
North Korean leader Kim Jong Un arrived in Singapore on Sunday for an unprecedented summit with U.S. President Donald Trump, an attempt to address the last festering legacy of the Cold War.
There has been widespread speculation about Kim's rare trip out of the North, where he enjoys supreme power.
President Trump and North Korean leader Kim Jong Un arrived in Singapore Sunday ahead of a highly anticipated summit. Japan worries about being marginalized by other regional players who have increased their interaction with North Korea.
Lim declined to comment for this story.
Meanwhile, President Trump arrived at Paya Lebar Airbase in Singapore in the evening and was also received there by the country's foreign minister Vivian Balakrishnan.
"It was around the time when conservative, anti-North Korea protesters camping out in front of his home every day", Lee told Reuters.
"But he was so composed and resolute, saying he's old enough not to be afraid of anything if he could contribute to making peace".
Kim, then 85, was in poor health but was insistent on going.
"Certainly, (I) hope all works out well".
President Trump has said he will use the summit, scheduled to begin Tuesday, to push for North Korea's denuclearization.
"We did not talk about human rights", Mr. Trump told reporters after the meeting.
Non-proliferation expert Daryl Kimball, director of the Arms Control Association, said that to make the summit a success, Trump and Kim would need to agree on a framework for expert-level negotiations "to hammer out the details and time frame for specific action-for-action steps".
I feel that Kim Jong Un wants to do something great for his people, and he has that opportunity.
"The dismantlement of all of its WMD and ballistic missiles will lead to a more positive future for all people on the Korean Peninsula and a chance of prosperity for the people of North Korea, who have suffered for too long". Past nuclear deals have crumbled over North Korea's reluctance to open its doors to outsiders. But there is scepticism whether he will suddenly give up an arsenal in which he and his family have invested for decades. In a New Year's address Kim stated the country's weapons development was complete in the wake of the most powerful nuclear detonation, in September 2017, and missile tests that could theoretically hit the U.S. mainland.