We want to be sensitive to people's concerns about privacy about their personal being and things, while ensuring that everybody on every flight has been properly screened.

We save limited resources in terms of who we are physically screening. The approach will allow us to pay more attention to those potential terrorists.

The reason we are doing these types of pat downs and using the advanced imagery technology is trying to take the latest intelligence and how we know al Qaeda and affiliates want to hurt us, they want to bring down whether it is passenger air craft or cargo aircraft.

But what I want to assure and reassure the public is we are concerned about your safety, your security, and your privacy. Let's work together in partnership to ensure that we can have the best way forward.

I particularly recognize that reasonable people can disagree as to what that proper balance or blend is between privacy and security and safety.

Our pat-down approach is very similar to what is being utilized in Europe and, as we know, around the world. It's even much more thorough in other parts of the world.

I did not want to provide a blueprint or roadmap for the terrorists, saying 'Here are our new security procedures'.