We're looking for hard-working individuals who recognize this as a great professional opportunity and possible career path into federal service. Our ideal candidate has equal parts desire to protect the flying public and strong commitment to America's security.

Because of this physical manifestation of stress and nervousness, we did identify them.

It's another effective layer of security which is relatively cheap.

We are training for objective behavior characteristics. Certainly, there is some interpretation, but there has to be such an aggregate number of concerns before we do get involved, and there will be constant review and oversight and analysis of the data to be sure their folks are performing in a proper manner.

Those (behavioral traits) are definitely linked to criminal activity and to terrorism.