Donald Trump and Kim Jong-un are meeting in Singapore today for talks that many - including the two leaders - thought might never happen. Secretary of State Mike Pompeo said the delegations were "rapidly" making progress, but it will come down to the meeting between the two leaders.
Trump descended from Air Force One into the steamy Singapore night, greeting officials and declaring he felt "very good" before being whisked away to his hotel via a route lined with police and photo-snapping onlookers.
Trump tweeted hours before the meeting that "we will all know soon" whether he can broker a deal with Kim that would help stave off the threat of nuclear war.
Although gaps remain over what denuclearisation would entail, Trump sounded a positive note in a lunch meeting with Singapore's Prime Minister Lee.
"I feel that Kim Jong Un wants to do something great for his people", Trump said at a press conference in Canada before departing the G-7 summit for Singapore.
However, he played down the possibility of a quick breakthrough and said the summit should set the framework for "the hard work that will follow", insisting that North Korea had to move toward complete, verifiable and irreversible denuclearisation.
North Korea has previously said it was willing to discuss denuclearization, but experts have expressed concern over the varying definitions of the term held by Washington and Pyongyang.
Kim is due to meet Singapore Prime Minister Lee Hsien Loong later on Sunday, Singapore's ministry of foreign affairs said in a statement. Meanwhile, Mr Kim has called Mr Trump "mentally deranged" and a "dotard".
In the past two months, he has met twice with South Korean President Moon Jae-in and twice with China's leader Xi Jinping.
It is the first time sitting leaders from both countries have ever met and marks a remarkable turnaround in the men's personal relationship.
The meeting is the first sit-down between a sitting USA president and North Korean leader and is meant to settle a standoff over Pyongyang's nuclear program.
What was initially portrayed by the White House as a summit meant to completely rid the North of its nuclear weapons is now being cast as a chance to "start a dialogue" and for Trump the dealmaker to look into the eyes and take the measure of his nuclear-armed antagonist.
The two leaders are set to meet on Tuesday at the Capella Hotel on Sentosa for talks which could see North Korea dismantle its nuclear arsenal in return for economic help and security guarantees.