A son overlooked and a jailed tycoon: Inside Samsung's succession drama

There's a dispute over what happened with the eldest son, Lee Jae-yong's uncle, Lee Maeng-hee, who traditionally should have inherited. According to one version of events, when he was given a chance to run the company, he was found wanting. He says he ran the company for seven years. But whatever the truth, it was the youngest son - Lee Kun-hee - who was named as the heir in 1976. It would be a decision that would ripple down the decades.