US President Donald Trump and North Korean leader Kim Jong-un have arrived in Vietnam, ahead of their second summit.
Mr Trump landed at Noi Bai airport in the capital Hanoi on board Air Force One hours after Mr Kim reached the city by train and car, for meetings that will take place beginning on Wednesday local time.
The meeting is expected to involve discussions about the progress towards ridding the Korean peninsula of nuclear weapons.
According to White House spokeswoman Sarah Sanders, the president will meet Mr Kim for a brief one-on-one conversation on Wednesday evening and they will have dinner together with their advisers.
The leaders will meet for a series of back-and-forth meetings on Thursday.
It is expected to build on the first summit in Singapore last year that was deemed historic and successful.
The June meeting produced a vaguely worded agreement, with both leaders agreeing to work towards denuclearisation.
However, it was not clear it would involve and little progress has been made following the summit.
Both leaders are conscious of expectations for an outcome that demonstrates progress, but Mr Trump appeared to not in any rush for North Korea’s denuclearisation to progress quickly.
“I don’t want to rush anybody,” he said.
“I don’t want testing. As long as there’s no testing, we’re happy.”
Pyongyang claims it has taken steps towards denuclearisation, by not testing any ballistic missiles or nuclear weapons for more than a year, and blowing up the entrances to its atomic test site.
However, the capabilities of nuclear facilities such as the Punggye-ri test site are not clear.
Satellite images suggest North Korea’s nuclear reactor for producing weapons-grade plutonium is still developing bomb material.
Former South Korean vice minister of foreign affairs Kim Sung-han has called it “self-directed denuclearisation”, where Mr Kim offers to dismantle nuclear facilities of his choosing to give the appearance of progress while not establishing a plan for denuclearisation.
Pyongyang wants increased security guarantees, while normalising US-North Korean relations with liaison offices.
The relationship with Mr Trump would give him legitimacy on the global stage and open a path to weakening economic sanctions against North Korea.
Mr Trump has repeatedly suggested at withdrawing US troops from South Korea, but there are concerns about it could mean for the region.
However, Mr Trump is more concerned with developing a dialogue and ending North Korea’s nuclear program.
Mr Trump said he expects the talks to be “very productive.”
“I think we’ll have a very tremendous summit,” he said.