Two years ago, the walkthru's werent set so high. If you did ring, you got a second chance to walk thru. If you rang again you were wanded. So you really only needed like 2 or 3 wanders in the back to do this.

Now, the machines are set more sensitive and you dont get a second chance. You have a average of about 20 to 40 rings if there are at least three lanes running (my airport at least). This requires more wanders to handle the problem. 5 or 6 wanders in the back is the norm now. But most smaller airports like Feinto is saying work with maybe 2 wanders in the back.

The prohibited items list wasnt so long. Now you have to be more aware on the xray and the images. Because unlike guns and IED's, little knifes, scissors, etc.. don't jump out like they others do. So more time is spent on the Xray, adding to the lines.

Your now required to do conuties bag checks, so your required to have a bag checker, of course most small airport FSD's have made little amendents to that rule. But thats still another screener and a little more time.

Then you get a lot of PAX who dont fly on a regular basis and because of it, they don't know the entire prodecure and just do a follow the leader type deal, instead of reading the signs or listening to what a screener is telling them, adding to the lines.

And Pre 9/11 security was quicker because it wasnt really security at all. It was just a more extreme window dressing, that was meant to keep just guns and bombs off a plane. It was more of a get the custom through and if a gun pops up then do something.