In 2016, U.S. government officials began reporting a mysterious set of symptoms. They first appeared in Havana, but then showed up in other countries around the world. For Vice World News, reporters Adam Entous and Jon Lee Anderson explain everything they’ve learned about what’s now commonly called Havana syndrome, and why the U.S. still can’t explain what causes it. On this week’s episode of Apple News In Conversation, Entous and Anderson discuss their reporting with host Shumita Basu. This is a preview of that conversation.