dramatically its altitude to 12,000 feet. give us an idea of what scenario matches with a plane suddenly turning and drop being to 12,000 feet. >> the military radar was able to discern by detecting that was not inconsistent with what pilots call a high dive, meaning at 35,000 feet you have some sort of catastrophe, decompression, fire, whatever the case, which necessitates getting the plane down to an altitude where you can breathe the air. 10,000 feet is the number you aim for. a high dive is a very dramatic move. it would involve a turn off of the air way and in this case back to land because presumably they were looking for an emergency landing site as well as a very steep descent. so what that military radar discovered was not inconsistent with that. the military radar, however, is not as accurate as it would be if you had a transponder returned radar image.