The secondary screening itself is more detailed than normal security. Once at the checkpoint, the traveler is usually directed to a separate lane or screening area. Officers may inspect carry-on luggage item by item, swab bags and electronics for explosive traces, and examine belongings more carefully than in a standard search. Electronics may need to be turned on to prove they are working properly. In addition, the traveler often goes through a full-body scan and a more thorough pat-down performed by an officer of the same gender. Identity documents may
What the “SSSS” Code on a Boarding Pass Indicates and Why Travelers Sometimes See It
