Al Qaeda actually has a very serious operational problem. They are quite fond of the spectular planned multiple-pronged attack. However, such an attack requires a tremendous amount of communication to carry out - and they have to be worried about our abilities to monitor their communications. This is why I am concerned about shipborne attack - the planning could be done in a foreign country and ships could come to this country and carry out a terrorist attack without further communications that could give them away, other than routine ship communications.
That is why we need to board and seize all ships engaging in routine communications!!!!