But that was exactly my point. That: a) It appears to be standard procedure in the aftermath of 9/11 to keep the cabin doors locked at all times. b) Many of t

But that was exactly my point. That: a) It appears to be standard procedure in the aftermath of 9/11 to keep the cabin doors locked at all times. b) Many of the cases mentioned where this is useful are cases where the cabin crew are incapacitated due to, say, hypoxia or some other malady. Given both of these I fail to see how this skill is as useful as others appear to be claiming it to be.