Trump landed back in Washington just after 5 a.m. on Wednesday.
US President Donald Trump has said that North Korea no longer poses a nuclear threat and his top diplomat offered a hopeful timeline for a "major disarmament", despite scepticism at home that Pyongyang will abandon its nuclear weapons.
Turnbull echoed that line: "I want to say that I do not believe that summit would have occurred had it not been for the absolute solidarity on the very tough economic sanctions on North Korea that have been imposed by the UN security council, that's had the support, obviously, of the United States and Japan and Australia and other countries, but also China".
But a joint statement issued after the summit said only that North Korea "commits to work towards the complete denuclearisation of the Korean peninsula".
The follow-up negotiations over North Korea's denuclearization might have become even trickier, as Trump himself set a high bar for verification when he declared the 2015 nuclear deal with Iran to be insufficient and withdrew from it.
USA allies Japan and South Korea were concerned that Trump agreed to halt American military exercises with South Korea, which North Korea has long claimed were invasion preparations.
He took a night-time stroll around some of the country's sights ahead of his summit with US President Donald Trump.
Trump said that North Korea is 'destroying a major missile engine testing site, ' which would represent a win for America.
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And I think what people need to do at this moment is take a step back", Hassett said . Trump says Trudeau "probably didn't know that Air Force 1 has about 20 televisions".
Trump and Kim today had a comprehensive, in-depth, and honest exchange of opinions on issues related to establishing "new" relations between the two countries and the building of a lasting and robust peace regime on the Korean Peninsula, according to a joint statement signed by them.
Pompeo, who flew to Seoul to brief South Korean leaders, said the brief, four-point joint statement that emerged from the summit did not encapsulate all the progress the US and North Korea had made.
On Tuesday, Trump told a news conference after the summit that he would like to lift sanctions against the North but that this would not happen immediately.
Sen. Bob Corker (R-Tenn.) said Tuesday that he wants Secretary of State Mike Pompeo to brief senators on the substance of what the two nations discussed, including whether USA troops stationed on the Korean Peninsula would remain.
"And Kim Jong Un I think is probably wanting to change because he's seen the difference between South Korea and North Korea", Burgardt says.
North Korea has taken no verified, concrete steps toward denuclearization.
He also announced an unexpected end to US-South Korea military drills.
The Chinese position echoes comments made by Russian Foreign Minister Sergey Lavrov, who called for a lifting of sanctions during a May visit to Pyongyang, North Korea's capital.
North Korea's state media has reported that Mr Trump has "expressed his intention" to lift crippling sanctions against the country - despite the USA president saying that they will remain until "nukes are no longer a factor".