eejit has a point, but I do not believe it belongs on this thread.
There are many redundancies built into commercial air transport today, so that variables in mechanical snags, crew performance, wx, etc. can be handled safely.
Had this identical event occurred at an airport with proper overrun space, we would be reading about maybe a $1 million damage and a few minor evacuation injuries, but no loss of life. However the existing Congonhas airport design removed that final layer of redundancy, that final safety cushion, and the loss of life is the direct result of
that. The same applies of course to
KMDW.