Procedure When Selected
Passengers who have been selected for this secondary screening can't print out boarding passes at home nor check in curbside or at kiosks. They must check-in at counters where additional verification is performed by airline staff. The passengers will have the letters SSSS or *S* (all capitals) printed on their boarding passes as a signal for the need for a thorough search at checkpoints.
SSSS passengers will go through a more intensive screening process which may include puffer explosive detectors. Their carry-on luggage may be also be inspected by hand. In the case of film or other items that cannot be X-rayed, the agent may perform a test for possible explosive materials. The screener may also use a hand held metal detector to search the passenger for metal objects.
Read more about this topic: Secondary Security Screening Selection
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