SNIPPET: "Shopping malls stepped up security measures and terrorism awareness training after 9/11, but it’s unlikely they could prevent a shooting rampage by a terrorist hell-bent on killing, according to industry experts. Malls lack access control, and their civilian security officers usually are unarmed, making them much more vulnerable to an attack such as the one suspect Tarek Mehanna allegedly suggested, although they are less likely terrorism targets than more high-profile, class-A office buildings, other iconic centers or power facilities.