One of the most striking elements of today's threat picture is that plots to attack America increasingly involve American residents and citizens.

It drove home, personally, the value of early detection and education and intervention.

I believe that Streamline should be part of our toolbox of things that we use at the border. And there needs to be a variety of things that we use at the border to get the most effective enforcement strategy. And so really it's a resource issue more than anything else.

Let me be very clear: We monitor the risks of violent extremism taking root here in the United States. We don't have the luxury of focusing our efforts on one group; we must protect the country from terrorism whether foreign or homegrown, and regardless of the ideology that motivates its violence.

I've appointed a task force to take a fresh look at the color-code system and whether we should retain it, change it or scrap it.

It would be unwise to say the least, irresponsible of us at the TSA, at the Homeland Security Department not to evolve our technology to match the changing threat environment that we inhabit.

The last thing the Department of Homeland Security is about is infringing on anybody's constitutionally protected rights.