A heavily-guarded motorcade, believed to be Kim's, was filmed traveling from Changi to St. Regis Hotel, a 5-star property located in downtown Singapore.
A jet carrying Kim landed Sunday afternoon amid huge security precautions on this city-state island.
"As the venue and time of the summit have already been announced, security for Kim Jong Un will be tighter than for any other VIPs", said the professor, who was the first academic to establish a university major in South Korea on guarding and protection.
"But going into this, Trump. he's going to come up with a deal that North Korea can't refuse".
North Korean leader Kim Jong Un shakes hands with Singapore's Foreign Minister Vivian Balakrishnan after arriving in Singapore on Sunday.
North Korea's leader Kim Jong Un walks with Singapore's Prime Minister Lee Hsien Loong at the Istana in Singapore June 10, 2018. Trump was headed to the meeting aboard Air Force One after a dramatic departure from the G7 summit in Canada.
United States President Donald Trump has expressed keenness about his summit with North Korean leader Kim Jong Un while calling it a "one-time opportunity".
In September, after North Korea conducted its sixth and largest nuclear test, Trump said in a tweet that Kim was " obviously a madman who doesn't mind starving or killing his people".
Jose Mourinho hopes Nemanja Matic Serbia exit World Cup early
Midfielder Fred also got his black barnet newly coiffured and shaped, with a special gel added that made his spiky curls glitter. Manchester United Manager Jose Mourinho is doing 2018 World Cup commentary for RT, the Kremlin supported television network.
In his New Year message, Kim extended an olive branch to enemy South Korea, sent a team to the Winter Olympics there in February, and held two summits with South Korean President Moon Jae-in in April and May. The summit comes after weeks of sometimes-contentious discussions and was briefly cancelled amid North Korean outrage over messaging from some U.S. advisers.
Many remain sceptical Kim will ever completely abandon his nuclear programme.
Any nuclear deal will hinge on North Korea's willingness to allow unfettered outside inspections of the country's warheads and nuclear fuel, much of which is likely kept in a vast complex of underground facilities.
For Trump, a successful summit will see him achieve badly needed recognition on the worldwide stage ahead of congressional elections in November.
The two countries were on the brink of war previous year, with their leaders trading insults and threats, until Kim made a dramatic offer in March to meet Trump and discuss nuclear disarmament, which the American president quickly accepted.
The historic meeting will be the first time a North Korean leader meets a sitting United States president and will take place on Sentosa island on Tuesday.
A source involved in the planning of Kim's trip said he was scheduled to leave Singapore at 2 p.m. on Tuesday.