Schneier on Security: Orlando Airport's CLEAR Program:

"And even worse, the system lets terrorists test the system beforehand. Imagine you're in a terrorist cell. Twelve of you apply for the card, but only four of you get it. Those four not only have a card that lets them go through the easy line at security checkpoints; they also know that they're not on any terrorist watch lists. Which four do you think will be going on the mission? By 'pre-approving' trust, you're building a system that is easier to exploit.

Nothing in this program is different from what I wrote about last year. According to their website:

Your Membership will be continuously reviewed by TSA's ongoing Security Threat Assessment Process. If your security status changes, your Membership will be immediately deactivated and you will receive a notification email of your status change as well as a refund of the unused portion of your annual enrollment fee.

Think about it. For $80 a year, any potential terrorist can be automatically notified if the Department of Homeland Security is on to him. Such a deal."

(Via Schneier on Security.)