Today, the distinction between domestic and foreign affairs is diminishing. In a globalized world, events beyond America's borders have a greater impact inside them. Our society must be open to people, ideas, and goods from across the globe. The characteristics we most cherish -- our freedom, our cities, our systems of movement, and modern life -- are vulnerable to terrorism. This vulnerability will persist long after we bring to justice those responsible for the September eleventh attacks. As time passes, individuals may gain access to means of destruction that until now could be wielded only by armies, fleets, and squadrons. This is a new condition of life. We will adjust to it and thrive -- in spite of it.