North Korea’s leader Kim Jong-un will never give up his nuclear weapons, according to a former senior officer in the country’s spy agency.

Colonel Kim Kok-song, who defected from North Korea, says he was involved in attacks and assassinations and even built an illegal drugs lab for the leader.

He’s been speaking out for the first time, exclusively to the BBC.

Mishal Husain presents BBC News at Ten reporting by Laura Bicker in Seoul.

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