SFO, two different incidents:
1) crew approaching a runway, something doesn't look right, they go along and are 30+ knots slow on final, crash, 3 dead, many injured, Asiana. GA decision too late.
2) Crew approaching runway, something looks wrong, someone speaks up, someone calls tower, and a GA decision is made in a timely fashion. Air Canada.
Cockpit culture and willingness to say "this doesn't look right" and speak up (confess to confusion) is to me a crucial difference, and why there is egg on face, and no dead bodies.
Granted, one would hope that all of the details and airmanship issues discussed for the last few hundred posts would prevent it getting that close.
I am glad someone spoke up and said "this doesn't look right" and then the GA happened in a timely fashion.(well, maybe not timely, given how close this was).
No approach is too beautiful to wave off.