North Korea's Kim Jong Un fires a senior official with an unusual insult

North Korean leader Kim Jong Un has fired a vice premier who was in charge of the country's machine-building industry. State media reported the dismissal using an unusual insult, describing the official as 'a goat yoked to pull an ox cart.'

Separately, Kim's sister, Kim Yo-jong, has made rare back-to-back public statements, which some experts say signals unease in Pyongyang about its external relations.