Originally Posted by UALOneKPlus

Swabbing / sniff test.

As the laptop goes through the x-ray, the screener viewing the x-ray images holds up his/her hand, holding up anything else from moving through. Another security screener is summoned, takes the laptop over to the swab station, swabs the laptop down on all sides, puts it into the sniffer machine and waits until it's done.

Imagine this happening with every other passenger, or more, with everyone waiting until the x-ray could keep moving the luggages through the machine. The lines kept backing up and growing and growing...