Re: Why did it require two?
Why did it require TWO crashes to begin to realize that there's something wrong?
Because Boeing and the FAA collectively stuck the fingers in their ears and denied that there was anything wrong. Until the preliminary report from the LionAir crash, they didn't even own up to the fact that MCAS was installed.
Lest we forget, it's only a week ago that the FAA was still expressing "complete confidence" in the 737MAX, and that was AFTER the second crash.