US President Donald Trump said Friday he will meet North Korea's Kim Jong Un as originally scheduled on June 12 for a historic summit after extraordinary Oval Office talks with a top envoy from Pyongyang.
After more than an hour of discussion with Kim Yong Chol, Trump told reporters that denuclearization -- and a formal end to the decades-old Korean war -- would be on the table in Singapore.
But the US president warned he did not expect to immediately sign a deal to bring a halt to the reclusive regime's nuclear program.
"I never said it goes in one meeting. I think it's going to be a process, but the relationships are building and that's very positive," he said, after waving farewell to the North Korean leader's right-hand man.
- Ending the war -
The Korean War has been largely frozen since an armistice ended hostilities, but not the underlying conflict, in 1953. Since then, there have been occasional clashes on the divided peninsula.
"We talked about ending the war," Trump said.
"Historically it's very important, but we'll see. We did discuss that, the ending of the Korean War. Can you believe we're talking about the ending of the Korean War?"
Washington is determined that Kim should agree to what US officials call the "complete, verifiable and irreversible" end of North Korea's nuclear weapons and missile programs.
Kim says he is committed to "denuclearization" in some form, but he is expected to demand security guarantees in return.
Most expert observers are skeptical of a rapid breakthrough, and Trump admitted it would be a long and difficult process.
"We're not going to go in and sign something on June 12. We never were. I told him today, 'Take your time'," he said, adding nevertheless that he expects "a really positive result in the end."
Kim Yong Chol, the most senior North Korean to visit the United States in 18 years, spent almost 90 minutes in the Oval Office.
Afterwards, Trump and US Secretary of State Mike Pompeo walked the North's delegation to their cars, smiling and shaking hands in front of the media before the motorcade pulled away.
- Security guarantees -
Meanwhile, discussions between US and North Korean officials continued in Singapore and in the Demilitarized Zone dividing the Korean peninsula.
On Thursday, Kim Jong Un told Russia's Foreign Minister Sergei Lavrov that his commitment to denuclearization remains "unchanged and consistent and fixed," but experts warn he will seek concessions from Washington.
In addition to an end to the war, he is likely to want international recognition as well as guarantees against any strike by the US forces stationed in South Korea.
Secretary of Defense Jim Mattis, however, said Saturday that the presence of American troops in South Korea is not "on the table."
For the North, denuclearization has long been code for the withdrawal of US troops from the peninsula and the end of its nuclear umbrella over the South -- something unthinkable in Washington.
Pyongyang has previously insisted that it needs nuclear weapons to defend against a US invasion.
But it remains to be seen if either side has changed its position following the whirlwind diplomacy of the last few weeks.
As expected, Kim Yong Chol handed Trump a letter from Kim that may clear up some of the questions. The US leader said the missive was "very nice" -- but then admitted he had not yet read it. An aide later confirmed he did after the talks.
It came only a week after Trump threatened to consign the entire process to history, abruptly cancelling the summit in a sharply-worded letter, only to revive preparations shortly afterwards.
Trump said that, after Friday's talks, the parties are "totally over that and now we're going to deal and we're going to really start a process."
Since the short-lived boycott threat, diplomats from both countries have conducted an intense flurry of talks, culminating this week when Pompeo sat down in New York with Kim's envoy.
- 'Their decision' -
Pompeo said on Thursday that, after what have now been two meetings with Kim Jong Un and three with Kim Yong Chol, he believes the North is at least ready to consider addressing US demands for denuclearization.
"I believe they are contemplating a path forward. They can make a strategic shift. One that their country has not been prepared to make before. This will obviously be their decision," he said.
There has also been a recent rapprochement on the Korean peninsula, with the two Koreas holding high-level talks Friday at the border truce village of Panmunjom.
The meeting followed two landmark summits between the leaders of North and South Korea in the last five weeks.
Seoul welcomed Trump's meeting with Kim Yong Chol.
"The delivery of a letter from Chairman Kim Jong Un to President Trump has apparently broadened and consolidated the road to the North Korea-US summit," said Kim Eui-gyeom, spokesman for South Korea's presidential Blue House.
China also welcomed the development, with foreign ministry spokeswoman Hua Chunying saying that Beijing hoped the two nations "will continue to move towards each other, to demonstrate sincerity, and to actively promote the preparations for the leaders' meeting."
Japanese premier Shinzo Abe meanwhile said, "I am determined to do my best so that it will be a historic summit."
US President Donald Trump confirmed that he would meet Kim Jong Un on June 12 after meeting a top North Korean envoy at the White House
Chronology of diplomatic tensions between the US and North Korea
North Korean envoy Kim Yong Chol held talks with US Secretary of State Mike Pompeo in New York before his meeting with Trump