9/11 caused the demise of my 'retirement job' - when the bank pulled the plug on us. Generally I read of huge advances in technology and safety, but when I read that one crew-member is left on the flightdeck as the door is locked behind them, I'm left bewildered.
I realize there can't be a public answer to part of this issue, but just leaving one crew-member behind something that would even delay assistance has to be just plain wrong. There are several forms of incapacitation that leave the patient not just incapacitated, but literally flailing about. One outfit I worked for trained the cabin crew in containing such an occurrence.