0riginally known as havana syndrome due to where it was first recognised, officials say the condition has now spread beyond cuba to every continent. the symptoms include hearing strange sounds and a feeling of heat or pressure. here's our security correspondent, gordon corera. cheering and whistling in 2015, the us reopened its embassy in cuba, as relations between the countries were restored, but then something happened. diplomats and spies began to hear sounds and fall ill with a mysterious illness that people struggled to explain — what became known as havana syndrome. the trump administration announced friday that it is pulling more than half of its staff out of the american embassy in havana. but it wasn'tjust havana. on a trip to moscow a year later, senior cia officer marc polymeropolous says he suffered similar symptoms.