In November 2016, shortly after the U.S. presidential election, undercover spies posing as diplomatic workers at the U.S. Embassy in Havana, Cuba, began reporting hearing high-pitched sounds that were followed by hearing loss and odd sensations. Soon, other non-spy U.S. and Canadian diplomatic workers also reported hearing the sound and feeling odd or nauseous. When the Cuban government was questioned about this, the incidents subsided, but came back soon. Embassy workers sent back to the states have been diagnosed with brain damage attributed to the sounds, and various sonic weapons have been blamed – along with pesticides and other non-sonic causes.