Aviation Accidents and how they can be stopped?

Are there any airline accidents that come to mind immediately when thinking of how many people could have actually prevented the disaster have they noticed something was wrong. The only ones that come to mind for me are the Tenerife accident, and the Avianca Flight 52 accident. Just curious for my own knowledge of... show more Are there any airline accidents that come to mind immediately when thinking of how many people could have actually prevented the disaster have they noticed something was wrong. The only ones that come to mind for me are the Tenerife accident, and the Avianca Flight 52 accident. Just curious for my own knowledge of crashes being able to be stopped.
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