The sense of anticipation was palpable as Mr Trump headed to meet Singapore's Prime Minister Lee Hsien Loong on Monday, with people lining the streets waving cell phones. He also thanked his Singapore hosts for their hospitality. "We appreciate your hospitality and professionalism and friendship". He is turning 72 on June 14.
Singapore's foreign minster Vivian Balakrishnan tweeted a selfie of himself with Mr Kim during the surprise walkabout. "Celebrating birthday, a bit early", he wrote.
While en route to Singapore, Trump said he looked forward to meeting Kim on what he anticipated would be an exciting day.
Trump's arrival came just hours after Kim, wearing his trademark dark "Mao suit" and distinctive high-cut hairstyle, landed in the ultra-modern city-state on his longest trip overseas as head of state.
The North Korean leadership, including Vice Minister of Foreign Affairs Choe Son Hui has also taunted Washington, calling Vice President Mike Pence a "political dummy".More news: E3 2018: Just Cause 4 Gameplay Trailer Introduces Extreme Weather, More
According to National Security Council spokesman Robert Palladino, President Trump intends to meet one on one with Kim. "We have 5,000 Home Team officers such as police and emergency response teams like civil defence", he was quoted as saying by Channel News Asia.
During the flight from Canada to Singapore, the president spent time meeting with his staff, reading materials, and preparing for his meetings in Singapore. He went out of his way to be cordial during two summits with South Korean President Moon Jae-in in April and May. Trump has also raised the possibility of further summits and an agreement ending the Korean War by replacing the armistice signed in 1953 with a peace treaty.
Trusted officials would maintain control of fixed telecommunications hotlines in the country, and there is likely a code system to activate the systems involved in launching North Korea's ballistic missiles.
Asked about a North Korean state media report that Trump and Kim were set to talk denuclearization and peace on the Korean peninsula, the official said the report is a hopeful indication.
U.S. Secretary of State Mike Pompeo said on Monday the "ultimate objective" of a historic summit with North Korea had not changed and the United States was "eager to see" if North Korea was honest about denuclearization. However, others reported that the Air China Boeing 747 took off before the leader's jet did by an hour or two as a security measure to avoid making his mode of transportation known.