North Korea accuses Pompeo of 'gangster-like mindset'

Relations between North Korea and the US have hit a snag during talks between the Secretary of State, Mike Pompeo, and North Korean officials over the weekend. Mr Pompeo has been accused by North Korea of a "gangster like mindset" in denuclearisation talks. The Secretary of State dismissed the claims in a press conference in Tokyo, instead saying the two nations had constructive conversations. US-North Korea relations expert, Dr Sung-Yoon Lee discusses the latest events with Guyon Espiner.