Swraj Paul is 90. He was born in Jalandhar, read at Lahore’s Forman Christian College, then at the Massachusetts Institute of Technology (MIT), before returning to join the family business in Calcutta (now Kolkata). His infant daughter Ambika’s illness brought him to London for her treatment. After she died, he and his wife, Aruna, settled in Britain to establish Caparo Group. In 1996, he was created a life peer. Six years ago, his steel business failed in the UK; and his son Angad, chief executive of the company, died by suicide. But the enterprise remains buoyant in the United States