It's a chess match.
bin Laden has attacked. Not with pawns. Knights. Jumped in over our heads, and knocked things around a bit. He's trying to draw us out. Get us inflamed. Perform an overly bold move.
The problem is that there are other pieces on the board. If we don't respond, he'll keep coming after us -- unfortunately in this game, there are more than 16 pieces. But he doesn't have unlimited resources.
What is inevitable is that we're going to have to make calculated strategic moves, and we're going to have to sacrifice some of our own pieces, no matter what. bin Laden's structured the board such that this is inevitable.
We have far more power, but his structure is arrayed far more deviously. It's going to be a tricky time of it, I think.
The problem is, I don't think W's spent much time playing chess.
On the other hand, I don't know what bin Laden's poker hand is like.