How did Elon Musk become the richest person on the planet? BBC business editor Simon Jack and journalist Zing Tsjeng chart Elon Musk's life, from a troubled childhood in apartheid-era South Africa to becoming a multi-billionaire entrepreneur. This rocket-fuelled journey includes his involvement in tech giant PayPal, to revolutionising electric cars at Tesla, and launching rockets at SpaceX. But becoming the richest person in the world comes with plenty of boardroom drama and controversy. Listen