I am confused. Next week I am flying to MAD from the DFW (U.S. citizen) and then connecting to a flight to Lisbon. I have a tight connection so the words Fast Lane caught my eye. Will my international flight be landing at a different terminal than my flight to Lisbon will be departing from? I only do carry on but I know I will have to clear customs but will I have to clear security even though I won't have to pick up my bags? What exactly is this Fast Track & does it apply to my situation?