President Donald Trump says the US is "prepared to start a new history" with North Korea after holding a summit with Kim Jong-un in Singapore.
Trump said at a news conference on Tuesday after meeting face to face with Kim that "real change is indeed possible."
"He reaffirmed his unwavering commitment to the complete denuclearisation of the Korean peninsula," he told a news conference.
Trump acknowledged that the timetable for denuclearisation is long, but said, "once you start the process it means it's pretty much over."
He confirmed that Kim had said a North Korean missile testing site "is going to be destroyed very soon".
The US president also announced he would be "stopping the war games" with ally South Korea.
Pyongyang has long objected to the annual exercises, viewing them as practice for future military action against the North by the United States.
Trump cast his decision as a financial consideration, saying the US will save a lot of money by cancelling the drills.
"The war games are very expensive, we pay for the majority of them," he said.
"Under the circumstances, that we're negotiating ... I think it's inappropriate to be having war games."
Trump said he and Kim discussed human rights briefly and he believes the North Korean leader wants to do the right thing.
The US president also said Kim had accepted an invitation to visit the White House sometime in the future. Trump added he would like to visit the North Korean capital Pyongyang "at the appropriate time."
He pushed back against a reporter's question that he gave up too much in exchange for his meeting with Kim, saying: "We haven't given up anything other than, yeah, I agreed to meet."
Trump is holding the news conference before returning home.