‘Like a drill going into my eye’: why the mystery over Havana syndrome refuses to die

Dozens of CIA officers have been afflicted by debilitating symptoms over the past decade. Are they the result of ‘mass hysteria’? Or are they from attacks with an energy weapon and, if so, who is responsible? And has there been a cover-up? Shortly after 1am one night in April 2019, a CIA officer on a work trip to London was jolted awake in his hotel room by the most intense head pain he had ever experienced.