Security of ports

I think the terrorists aren't probably going to attack a port, here's why. How many people are at a port? Terrorists are interested in getting as much media attention as possible. That's probably why they target people. Targetting a port doesn't have the same appeal as targeting oh, the trade centers.

Now I'm not saying they wouldn't try and smuggle stuff through a port or try and steal anything. But how many times have tried attacking a port? What I do think is a real issue is the border.