An even simpler means of causing massive devastation is merely put an incendiary device aboard a freighter or bulk carrier hauling amonium nitrate (even without the fuel oil) and you have a Texas City type blast. This article did not even mention the security in the Port of New York which being busier has even less effective security. As far as the security of the docks in Portland, Me. or any other Northeast Port it is non existant. There is no way that any ship in these ports can be protected from underwater attack. There is no way a USS Cole type attack could be twarted. There is no way a an auto piloted 20 footer loaded with HE could be stopped in these harbors. In short the terrorists do not even need to become martyrs to accomplish their tasks in such a scenario.
Clearly until and unless we become very serious about protecting our nation from attack we are very vulnerable.
Stay well - Stay safe - Stay armed - Yorktown
The only way to protect ourselves at this point is to segregate out the pool of likely terrorists.
We'll do this after we lose a city, and our transportation is paralyzed.
Can you imagine if we had 10,000 German "students" who were actually SS officers running loose in the USA in 1942? That's where we are.