Such a system would be very, very expensive and laborious to have, given the kinds of border we have. Scientists and engineers aren't even sure they have the technology to make it work

So not only do we need to deal with threats as they emerge, we have to be thinking in anticipation of future threats, and the things we do have to be things that enable the system to continue to work.

Now, a lot of what we are doing right now, quite frankly, is because of what happened on Christmas. Many of the things were kind of in the works. We were already planning, for example, the purchase and deployment of advanced imaging technology. You call them body scanners. We call them AITs (Advanced Imaging Technologies).

But my view is that you need a system at the border. You need some fencing but you need technology. You need boots on the ground. And then you need to have interior enforcement of our nation's immigration laws inside the country. And that means dealing with the employers who still consistently hire illegal labor.

We have at least 125 communities in Arizona at risk from wildfire, not because of review processes or litigation delays but because of a lack of federal funding on the ground to actually begin the projects.

Each and every one of the security measures we implement serves an important goal: providing safe and efficient air travel for the millions of people who rely on our aviation system every day.

What we're going to do with cyber-attacks - and we have already actually started - we started well before the executive order actually was issued - is working with the private sector, determine how best to share information, because, you know, we can't help until we know that there has actually been an attempted intrusion or attack. Information-sharing piece is very important.