For two centuries, Americans have been protected by two large barriers called oceans, behind which we have built a world view based on an expectation of security and peace.

They have given us the freedom to build an independence of spirit and self determination that is somewhat unique in the world. We believed we had a choice about whether we should be isolated and apart from wars and troubles in other parts of the world.

Most countries around the world are not isolated as we are. They have common boundaries with neighbors who have not always been friendly, and with borders that have seen wars and incursions as far back as anyone can remember. They live their lives with an awareness that trouble can be over the next hill or river, tomorrow or the next day.

Those other countries sometimes have trouble understanding our attitudes about this. To them, we seem to be aloof and imperial.

We, in turn, are having trouble adjusting to the new realities of our geography since 9/11. We will, of course, adjust, but it isn’t clear how long it will take us to see the new situation for what it is.

Borrowing from Scarlett O’Hara: we’ll think about that tomorrow.

The rest of the world may not wait.