switched off, and then you hear a voice say, "all right. good night," are you convinced that it is the pilot, given that we just talked to one pilot before the break who was saying usually there is a whole lot of other information identifiable information for the pilot before they say good night? is this -- how strange is this to you? >> it's strange. but richard's right. ordinarily you have to do the readback and you have to do the readback because, and it's part of air traffic control, because sometimes pilots get lost in the hertz. meaning they have the wrong frequency and switch over, there's not, no way to contact them. but air traffic controllers and pilots alike get sloppy, particularly at night. i've had air traffic controllers wish me a happy birthday before and people don't usually get wound up about it. the second thing is, the fbi and law enforcement agencies around the world have a very reliable way to do voice identification. if they haven't done it already, they should already know worth