AIRPORT SCREENING SECURITY (Security screening involves the application of various methods and means, either individually or in combination. The equipment used may include: walk-through metal detectors, portable metal detectors, x-ray scanners, explosive detection systems, explosive trace detection systems, liquid explosive detection systems, body scanners and explosive detection dogs. These methods may also include measures such as: physical inspection, random checks (automatically generated by security equipment), removal of footwear, removal of electronic devices from luggage, security interviews or restrictions on the transport of liquids). Depending on the alert level or destination, more stringent security measures may be applied).