World in Progress: The story of the Koh-i-Noor diamond

Today, the legendary Koh-I-Noor diamond is part of the UK's Crown Jewels. The story of the diamond mirrors the history if South Asia. First discovered in medieval India, the diamond went on a chequered journey across countries and continents. It's a thrilling story of wars and wealth, treason and secrets - and about a curse, that's said to strike all male owners of the Koh-I- Noor.