but they're pretty reliable. of course, if it landed on land, then you wouldn't expect the transmitters to go offer. >> next question to mary, this is from rick rice. it's been mentioned the plane dove to 6,000 feet and the co-pilot's cell phone might have been on. don't you think it strange that the plane turn went from 30,000 feet to 6,000 feet with 239 people and none of the passengers picked up or made a cell phone call? this is something we've talked about several times here. talk about that. >> not only do i find it strange, i find it impossible, because the distance in which it would have had to dive from 35,000 feet down to 4,000 or 5,000 feet and then climb back up to 35,000 feet was only 125 miles, and it just is not reasonable. and then, not surprisingly, over the weekend, they now determined -- not determined, they now think that it actually climbed to about 39,000 feet and then stayed at that altitude.