lot of opportunities and certainly should have a lot of incentive to make sure that that never happened again. but what we're learning now is that the repair, if you will, or the fix was continue to certify a page or two, make some changes in the manual, not many, and call for the pilots to have an hour or so of what we call desktop training or computer training. the pilots were not instructed, the airlines were not instructed to put their pilots through any simulator training where you'd have hands on feeling of this stick shaker when this system went off that malfunctioned, the system as we've talked about many times of pushing the nose down when the pilot -- at a time when the pilot's trying to pull the nose up. so that's going to be looked at as well. who made that decision, what was it based on? and one of the other things they'll be looking at are the risk factors. one thing that you never want to have in aviation because aviation is so safe because of redundancies, you know, there's never one fail point in a system. you have lots of backups.