Exploring the science and conspiracy theories behind the phenomenon that gave dozens of diplomats concerning symptoms, Havana Syndrome. In 2016, U.S. diplomats in Cuba began reporting strange symptoms—piercing headaches, dizziness, and an unexplained sense of pressure in their heads. Over time, more cases emerged, spreading beyond Cuba and fueling theories of high-tech weapons and espionage. Today, we explore the unsettling mystery of Havana Syndrome.