North Korean leader Kim Jong Un and US President Donald Trump arrived in Singapore on Sunday ahead of their highly anticipated summit on Tuesday. Topping their agenda will be Pyongyangs nuclear arsenal, with Trump saying the meeting was a "one-time shot" at peace. Bringing the Korean War to a formal end 65 years after hostilities ceased will also be on the table at the first-ever meeting between a North Korean leader and a sitting president of its "imperialist enemy". Kim arrived in Singapore on board an Air China 747 that according to flight tracking website Flightradar24 took off from Pyongyang in the morning ostensibly bound for Beijing, then changed its flight number in midair and headed south. He was driven into the city center in a stretch Mercedes-Benz limousine accompanied by a convoy of more than 20 vehicles. He smiled broadly Sunday evening as he met with Singapore Prime Minister Lee Hsien Loong. "The entire world is watching the historic summit between (North Korea) and the United States of America, and thanks to your sincere efforts ... we were able to complete the preparations for the historic summit," Kim told Lee through an interpreter. "If the summit becomes a success, the Singaporean efforts will go down in history," Kim said. Trump landed in the evening after a long flight from Canada and the G7 meeting there, telling Singaporean officials who welcomed him that he was feeling "very good" about the summit. Trump is set to meet with Lee on Monday. Authorities imposed tight security around the Singapore summit venue and the luxury hotels where the leaders were to stay -- including installing extra pot plants outside Kims accommodation to obstruct reporters views. US and North Korean officials are set to meet Monday morning in Singapore to make final preparations for Tuesdays meeting. White House press secretary Sarah Sanders said Sung Kim, the US ambassador to the Philippines who has taken the lead on policy negotiations with the North, will hold a "working group" session with a North Korean delegation. This will be the first summit of its kind between a leader of North Korea and a sitting US president. The North has faced crippling diplomatic and economic sanctions as it has advanced development of its nuclear and ballistic missile programs. The North Korean autocrats every move will be followed by 3,000 journalists who have converged on Singapore, and by gawkers around the world, up until he shakes hands with Trump on Tuesday. Part of the interest in Tuesdays summit is simply because Kim has had limited appearances on the world stage. He has only publicly left his country three times since taking power after his fathers death in late 2011 — traveling twice to China and once across his shared border with the South to the southern part of the Demilitarized Zone in recent summits with the leaders of China and South Korea, respectively. Washington is demanding the complete, verifiable and irreversible denuclearization of the North, while Pyongyang has so far only made public pledges of its commitment to the denuclearization of the peninsula -- a term open to wide interpretation -- while seeking security guarantees. North Korea and the US have been at loggerheads for decades. The North invaded the South in 1950 and the ensuing war pitted US-led UN troops backing Seoul against Pyongyangs forces which were aided by China. The conflict ended in an armistice which sealed the division of the peninsula. Occasional provocations by the North have continued while Pyongyang has made increasing advances in its nuclear arsenal, which it says it needs to defend against the risk of a US invasion. US Secretary of State Mike Pompeo said last week that progress was being made in bringing the two sides together in their understanding of denuclearization. But Trump baffled observers when he said he did not think he had to prepare "very much" for the summit. "Its about attitude," Trump said. "So this isnt a question of preparation."