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Do we ensure the safety of the search and rescue crews? >> well obviously you can have some mountaineers who are used to operating in this kind of environment. they have what would be the equivalent of our coast guard here that might be used to that mountain environment. but clearly with the expectation, with the airplane just pulverized the way it is you're not going to be looking for survivors, you're looking for recovery. with that being the case if the weather is too bad, you just stand down the recovery teams. >> quickly, i want to talk about maintenance for that particular plane. we hear...

Seen the airplane descend far more rapidly than it did. so this seems to be kind of a long controlled descent. that raises the question if it was an emergency, why did the pilots radio something or send something through the transponder to indicate an emergency? we don't have that. that then raises the question what were the pilots doing and we just don't know. with recovery of the cockpit voice recorder hopefully that will give us the answers within a couple of days. >> there's so many theories being thrown around including was there a problem with the autopilot. i want to talk about search a...