Seeking Security

It starts with the noise. Harsh mechanical sounds like loud screeching. Then, an uncomfortable pressure, a loss of balance like being hit with a beam of energy.All of that can be followed by months — even years — of headaches, nausea, hearing and memory loss.Since 2016, more than 200 US government officials have described feeling some or all of these symptoms and others. It's widely known as "Havana syndrome," since the first cases were detected in the Cuban capital.The number of reported cases of possible attack is sharply growing and lawmakers from both parties, as well as those believed to be affected, are demanding answers. But scientists and government officials aren’t yet certain about who might have been behind any attacks, if the symptoms could have been caused inadvertently by surveillance equipment — or if the incidents were actually attacks.Cuba and other countries where these types of attacks have been reported deny any involvement. Related: More details but no answers in brain trauma cases of US