accounting guy, a business guy. maybe it's time to put engineers at the top. >> mary, you were the ig far long time. is this also in addition to an engineering problem a regulation problem? >> yes, it is. it's a huge regulation problem. because federal aviation regulations among other things say the plane has to be aerodynamically stable and this is not without the mcas system in boeing's words. of course they're tweaking it but that isn't going to help this. and you have another problem in federal aviation regulations requiring a redundancy. you cannot have a system that takes data from only one angle of attack indicator. just like you have to have not only double systems in some cases but trip toll resolve the issues. so by relying on one and it's -- even the patents, i've read the patent documents. even that's a little fuzzy. but relying on one and having a