this happened. just to remind everybody, i know you know this, remind everybody that we know the americans what they were dealing with when they came back. we're talking about hearing loss, dizziness, problems with their vision. headaches. what do you make of the fact that this happened in cuba and now something very similar is happening in china. do you see a connection? >> i don't know. it will be interesting to see what the accountability review board comes back with. there could be -- look, for this kind of thing, if it's a sound-based weapon and we don't know that it is, it would either be infrasound which is very low frequency or ultrasound, very high frequency and both which could be weaponized and used in a deliberate way and now that they have another patient from a different place, i'm sure they're going to be tracking those symptoms and that individual's condition with those that came back from cuba to see if there are real