Plane or train, it's never clear how North Korean leader Kim Jong-un will travel. And speculation is building about how he'll make his way to Vietnam for his second summit with President Trump.
Bruce Harrison reports from Seoul.
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Leader Kim Jong-un flew to his first summit with President Trump in Singapore.
But land travel from Pyongyang through China and all the way to Hanoi is an option.
Kim Jong-un is reportedly paranoid about travel.
North Korea's state jet is an aging Russian model no-longer manufactured.
And his father, Kim Jong-il, thought it safer to stay on the ground.
A train ride from Pyongyang to Hanoi would take at least two and a half days.
But Reuters reports Vietnam is preparing for a train arrival.
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