If I were a terrorist (and, for the record, I'm not) my next target would be the line-up in front of the security checkpoint.

I mean, where else can a suicide bomber unobtrusively walk into the middle of a crowd of several hundred people carrying (or rather, dragging) two 100-pound bombs?

The problem is, the TSA never bothered to do a proper Threat-Risk Assessment; so they really have no clear idea what they're trying to protect us from. Is it to prevent terrorists from using airliners as weapons of mass destruction? Most of the security measures implemented since 9/11 have nothing to do with preventing such a recurrence. Is it to prevent terrorists from killing people aboard airliners? Why? Why is it worse to be killed by a terrorist on board an airliner than in the parking lot of a Michaels Craft store in Virginia - or standing in line at an airport security check point?