Originally Posted by thebat

I was leaving SLC yesterday. The security lines were very long--maybe a half hour or so. A TSA guy was walking around, chatting. He said they were surprized by the amount of people, that Saturday afternoons were usually quiet.
So that raises the question: How could they not know how many people were going to check in? Wouldn't that number be available by simply polling the airlines. I mean, how many walk ups could there be?