We must remain constantly vigilant. We dare not underestimate our enemy. Al Qaeda is committed to the destruction of America, and they are in it for the long haul. They are much smarter than many give them credit for being, and they are definitely much more patient than the pace of our fast-food society conditions us to be. Their commitment does not depend on bin Laden or any other single leader.

p. 292 - Never Again: Securing America and Restoring Justice (2006)