 We're going to hear more about that mammoth mission shortly, but what's interesting about this is how it's raised questions about keeping whales in captivity in the first place. So in this episode, we're going to look at which countries still house whales, how the conversation around using them for entertainment has changed, and how a group of South Korean activists called the Hot Pink Dolphins is campaigning for change. I'm William Lee Adams, and this is What in the World? from the BBC World Service.