After the ID process, {HEAD ~ the passenger} can be checked into the flight in the normal way and then given a smartcard wireless device which serves as {TAIL ~ a boarding pass} and airport tracking device 
After the ID process , { HEAD ~ the passenger } can be checked into the flight in the normal way and then given a smartcard wireless device which serves as { TAIL ~ a boarding pass } and airport tracking device
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH