[tonmo]

Simple. Because the economy would collapse. What if there were to be a lot of money (I dunno... billions) devoted to regulating traffic? Couldn't this be done in a way that wouldn't cause our economy to collapse, while severely restricting enemy infiltration by heavy monitoring?

[AntiGuv]

Sure it could - but that's tightening the border controls, not closing the borders down altogether. Perhaps that's what the original post meant though I took it literally. In any case, so far as the ports are concerned, it seems that conflicts between the maritime companies & the longshoreman unions are the greatest impediment (aside from the breadth & scale of the problem). I really haven't looked into any of the details about that or why the Feds aren't moving more aggressively to improve port security. To be honest, I just figured that's one of the things this new Homeland Security Department is supposed to take care of whenever it gets organized.