going to be a direct, contributing cause to this accident that somehow this additional aircraft overwhelmed the air traffic control system and made it difficult for them to evade the weather. i don't buy that. but i do think it says an awful lot about how the airline might be operating and how the regulators may be operating, or not so well in that part of the world. you know aviation safety is all about a million tiny little technological things that you have to get right. you have to dot every i and cross every t. when you look at the face of things and see that there's an i that isn't dotted or there's a weather report that was nonstandard, all those things start to add up. and that begins to erode what we call aviation safety. >> david, in terms of the conditions obviously if it's too dangerous for divers can robots can undersea vehicles can they be used? >> no. >> it's shallower water. zero visibility is still zero visibility. >> that's right, anderson. i thought initially our ov