Originally Posted by
BigFlyer
After the x-ray, the bags are automatically routed one of two ways. The bags that pass the x-ray inspection continue on down the belt and you take it off the belt an you are on your way. The bags that don't pass are routed to a parallel belt which is blocked by a plastic screen so you can't get your bag. For those bags a screener takes each bag, asks for the person to whom the bag belongs to approach, and the screening continues. Sometimes they open the bag, sometimes they swab. But the result is those bags that pass are not slowed by those that don't.
Until the entire belt is blocked by the bags that got flagged by the X-ray guy.
If you need more than one tray, then your stuff doesn't go through the X-ray together, and it's very difficult to keep an eye on all of your stuff at once.
The queue (line) is just further back than you think it is.