But North Korea now deems itself "a nuclear state", and insists the US must end its "nuclear threats and blackmail" as a precondition for denuclearization, according to a statement last month from First Vice Minister of Foreign Affairs Kim Kye Gwan. It came after the two leaders had spent months trading insults and threatening to wage war against each other, but this tough attitude appears to have paved the way for both sides to the negotiating table.
Ahead of the meeting, Trump had said he would be able to work out within the first minute whether his North Korean counterpart was serious about making peace. The president also said he would "absolutely" invite Kim to the White House soon.
In Singapore, the island city-state hosting the summit, the sense of anticipation was palpable, with people lining spotless streets Monday waving cellphones as Trump headed to meet Singapore's Prime Minister Lee Hsien Loong.
Kim left Capella Hotel just moments after the declaration was signed and ducked questions from reporters about whether he had spoken about giving up any of the North's nuclear weapons.
DPRK stands for the North's formal name, the Democratic People's Republic of Korea.
"She called me and said, 'Dennis, Donald Trump is so proud of you".
President Putin shows desire to host G7 at Moscow
The 2015 agreement between Iran and world powers lifted worldwide sanctions on Tehran. We will be ready to greet them all in Moscow '.
It's so far unclear whether the USA and North Korea will release some kind of joint statement or agreement following the sit-down.
But North Korea's complete denuclearization is "the only outcome that the United States will accept", Pompeo said, and sanctions will not be lifted until that happens.
The Trump administration seeks a "complete, verifiable and irreversible" dismantlement of Pyongyang's vast nuclear weapons program, which has produced up to 60 nuclear warheads housed across the country, according to U.S. intelligence estimates, as well as a sophisticated program for their delivery worldwide. "At the end of the day, President Trump has said that he will decide based on how he feels about Kim".
Both men have expressed frustration at the lack of progress in previous negotiations and may be interested in a game-changing breakthrough that redefines the relationship between the two nations. I knew things were going to change.
The North has faced crippling diplomatic and economic sanctions as it has advanced development of its nuclear and ballistic missile programs. But he also patted the US president' arm, in an attempt to show control over the encounter.
In brief remarks this morning to reporters before their private meeting, Trump said he expected to have a "great discussion".