Dave wrote:
Hmmm. No mention of September 11, 2001.
I would have thought those plane crashes would have made the list, given the
drastic changes that resulted.

No, because those crashes were not unintentional. There was no failure
of technology or pilot error involved.

David Johnson


The Eastern L-1011 flight that flew into the Everglades
while the crew fiddled with a light bulb back in the 70's
created new alerts on radar software for controllers and new
landing procedures.

MSAW(Minimum Safe Altitude Warnings) were born from that crash