The obvious choice is aviation -- there are thousands of commercial accident reports, many of which lead to process improvements for everyone else afterwards, a

The obvious choice is aviation -- there are thousands of commercial accident reports, many of which lead to process improvements for everyone else afterwards, and general aviation emergencies every day. YouTube especially is full of ATC audio combined with radar visuals and commentary for emergencies. For tech, Dan Liu maintains a list of tech company incident public post-mortems: https://github.com/danluu/post-mortems https://github.com/danluu/post-mortems