Forgive me for using layman's terms here. Regarding the MCAS required for certification, is that just a technical FAA requirement? In other words, is it one those regulatory requirements that has no bearing on the actual air worthiness of the aircraft in question, but just some kind of metric the FAA put in there? Put another way, in your view, if this certification weren't a requirement, is the Max air worthy for the run of mill proficient American trained pilot?