ASH, I actually agree with you, White None and mr Q. However, we always view our company operation from our own perspective and, to a degree, assume that everyone operates the same way. It could be argued that that's a reasonable assumption. However, combinations of personalities might well lead to a set of circumstances where situational awareness is compromised which, in turn, might lead to something such as the event we're discussing at the moment. As SMOC points out, this sort of thing has happened.
I suppose my point is that we're not immune to events such as this simply because our SOPs are very strong in this particular area. We should never become complacent about our operation as to do so is fraught with danger.
STP