Originally Posted by JayJay
I need to do this. I only remember to sign up as I'm waiting in the security line, which is very often. In fact, just went through security and wished I had signed up.
Afaik you actually don't need to sign up. Apparently TSA proactively assesses your "risk profile" and decides to grant you status when you check in. How they get your "risk" information and what they do with it is a completely opaque process to me and a bit concerning if I really think about it, but I do enjoy the expedited screening.
You might be thinking about Global Entry, which is expedited immigration when reentering the United States, and you have to apply for this and pay $100 (and presumably get a virtual anal probe before getting approved)