Jay,
I have repeatedly said throughout my posts that there is no criticism, implicit or direct, of the actual people on the ground that evening. None whatsoever, and from what I have been told there is nothing they could have done in any case. So I have plenty of slack for those concerned.
My criticism's were entirely leveled at the force as a whole for, in my opinion, relying too heavily on the "its a major intl airport" argument with regard to security. The security at BHX has been subject of public derision in the past (reported
here), so WMP can have (again in my opinion) no excuse save for complacency as the attack itself doesn't appear to be particular sophisticated (well planned, yes).
Of course, as others have elluded to - perhaps, on a commercial / financial basis its cheaper to get insurance who are happy with the risk and accept the occasional loss. Unfortunately the insurance won't help with public perception! As I have also said earlier, the interesting thing will be what if any improvements are made at BHX as a result of this and insurance demands...