My question still stands: if we're not put increased emphasis on people based on physical characteristics, what behaviors should we be looking for when screening a planeload of people? If you want to behavior profile, what are we looking for? I'm curious, because the hijackers took great pains to blend in.
I wonder what the Air Marshals are trained to look for?
On a lighter note, I came across this website while googling "Terrorist Identification"
It gave me a much-needed laugh.