This discussion is, unfortunately IMHO, going the direction such things usually go.

Just one comment about port security: CNN interviewed a (American) terminal operator the other day. He said that cargo security is entirely in the terminal operator's hands from the time the cargo hits the dock (and leaves Coast Guard control) until it is transferred to the forwarding shipper...which means to a train or long-haul truck. Someone mentioned stevedores. There are few, if any, break-bulk ships any more. Nearly all shipping is in containers. The union stevedore's job is to run the crane that lifts the container off the ship and transfers it to a truck body or to a port-side cargo handling system.