So people have to decide. Do they want to have the security? Do they want to continue to plug the gap [in border security] that GAO has identified and recognize that there will be some costs to doing that? Or do we want to make sure that business isn't hampered and that people can move back and forth readily, and recognize that, if we don't put some barriers in place, we're going to wind up with dangerous people coming into the country?

We always monitor the flow of information, intelligence, threat streams to see whether we have any indication there's some imminent. We work hard to identify potential cells and disrupt them. This is one of the reasons we put so much emphasis on intelligence gathering.

The Department of Defense took 40 years to get where it got.

We don't really have the ability to enforce the law with respect to illegal work in this country in a way that's truly effective...We haven't been able to require every employer to enter a system in which they check the work status of their employees and determine whether they're legal, and without that, we don't really have the ability to enforce the law with respect to illegal work in this country in a way that's truly effective. And that would be the single greatest additional weapon we could use if we're serious about tackling this problem.

There really is no vacation from the world in which we live.

Al Qaeda is very media-savvy and very focused on what goes on in the global media.

Even the kinds of ingredients you can find in your own kitchen can be used to make bombs. So the problem is with the people and not with the tools.