BBC Minute: On why Donald Trump is a 'game changer' for North Korea

In this fifth BBC Minute on North Korea we're looking at relations between the US and North Korea. Donald Trump has called for the North to disarm, while Pyongyang has described him as a 'dotard.' The BBC's Alistair Coleman explains why US President, Donald Trump, has been a 'game changer' to, already strained, relations between the countries.

(Photo: This combination of pictures created on October 1, 2017 shows, US President Donald Trump at Morristown, New Jersey, Municipal Airport on September 15, 2017; and North Korean leader Kim Jong-Un waving following a military parade in Pyongyang on April 15, 2017, Credit: MANDEL NGAN/ED JONES/AFP/GETTY IMAGES)