I recently stated in a previous post that terrorist are not really interested in taking out systems through the internet or should I say this is not thier focus, I'm quite sure they will use the internet to cause problems but, physical forms of terror are a more effective way for them to go. just drive around your neighborhoods and look at the physical structures. there are alot that could be breached! airports (shoulder launched missile in an open field), oil refineries(granade thrown over a fence) and railyards(bomb placed on a chlorine tanker)...
these are just some of the things I see in the area where a I live. I think industrial parks need a neighborhood patrol too! everything can't be left up to the police.

cyberterrorism If it's going to be used as a means of attack will be more effective if its done in conjunction with a physical attack(a cyberattack on a communications network to blind then physical attack on the target to maim)

just my two cents