The first profile cut...ethnic appearance
The second cut...accent (foreign or domestic)
The third cut...cultural wardrobe
Obviously normal black and white Americans will proceed directly to the Muhamet cartoon and joke room before boarding. Including Sihks.
Arabs will be questioned and then sent to the joke room. Arab Christians will be allowed to board. Mozlums that freak out will be taken into custody, others will be directed to the FBI offices for questioning, and then to the car rental counters.