One tactic, described along with the shots from the AQ training clips, sticks in my mind. Five-man teams, with a vehicle (a "technical" pickup with a bed-mounted M60). These were used in a couple of the attacks on compounds in Saudi Arabia. The teams shot up gate and patrol security, while the "hero" drove his bomb into the populated part of the compound. Substitute "mall" for "compound" and "Wal Mart Supercenter" for the populated section, and you have a recipe for a strike in the soft part of safe, secure, small town America. While the wife has dredged through the stores, I have often stayed in the car, observing local life ... OK, girlwatching. In addition to the obvious, I've noticed that at any one time there may be one to three local LEOs in, or moving through the area. Also, I often recognize people from my CCDW classes - five in one short period one Saturday afternoon but one or two almost always. Too many other variables to predict the outcome of an attack, but the guns may be there, and the people who have them are certainly of a mind to be prepared.