As a regular flyer, I'm not really concerned about the "flight" part of the process. Despite all the hoo-hah about the Nigerian idiot, the ability to get enough dangerous stuff onboard or enough bad people to enable a 911 scenario has been minimalised. My concern is landside and I have to say that is where I do get twitchy. In the current environment, I think it is the most dangerous part of the process. From the entrance to the terminals to the access routes to scanners/security checks, the environment is highly congested, probably with more people than would be on an aircraft. I'm afraid I can't see how a couple of armed bobbies would deal with the sort of instant devastation that can be caused by two or three committed Terry T.