airplane could become unflyable. >> the backup power source, that allows it to fly for an hour, you can't communicate? >> the communication is limited. >> but there's some. >> if there was a may day, they should be able to say and communicate, hey, we've got a problem. >> they should. but what initially happened out over the water, maybe not. there's, like, five different communication systems. >> but at the end, they were flying over malaysia. >> the one that's tied into the standby power is the shorter range one. so it might not work out over the water, but it probably would work. but they were nearing the end of their power reserve at that point. >> lots of unanswered questions, but they're narrowing in, at least they're getting some more specifics in the malaysian air force. this senior official sharing some critically important information with all of us. kit darby, thanks very much for your expertise. everyone has been extremely helpful in getting us a better