concussions. a lot of them weren't at the same place at the same time. the state department sent people down and through investigating there was a sonic device placed in their residence. it's really serious. we don't know why it was. the officials are telling patrick in havana, they don't think it was ease dropping, more of a sonic attack, attacking the brain waves, maybe the people involved didn't know the damage but at least one of the people is going to have to use a hearing aide from now on. the cubans say they had nothing to do with it. the fbi is investigating. >> it happened late last year? >> started late last year through a period of several months. >> they are still investigating -- >> they are still investigating. in may, they had to bring them back for medical treatment. they say we have to bring some of our diplomats back, we want