The most immediate concern is the tragedies of all the lives lost in the crashes.<p>Separate from that, I also thought of credibility, since I've been proud of the FAA's and aviation industry's professionalism and numerous safety achievements. I've also sometimes held up some of their practices as models for more responsible software engineering.<p>I look forward to authorities gaining a comprehensive understanding of whatever went wrong, and taking whatever corrective/improvement action that suggests, as honest professionals. That's what's largely worked for aviation safety.