We can interpret potential behavior just by assessing
a few basic physical characteristics of an individual.
Here's a thumbnail profile showing some vital information every
TSA employee,
FBI and CIA field agent,
US Marshall and law enforcement person could have known prior to 9/11.

The photo in the middle is the real Mohammed Atta. Each side photo is a mirror of the respective side of his face to make a full image. Notice the physical differences from photo to photo and pay special attention to the differences on each side photo.

The greater the differences in each side, the moodier the person is as they switch back and forth between the extremes in their outward behavior.

Notice the angle of the marks along side his head. A "kidney bean" shaped head means a person swings back and forth between naturally acquiring possessions to not doing so. Understand the distinction? Potential thief half the time perhaps?
This is his right side mirrored. Assuming he was right handed and right eyed, this side reflects his "OFF" mood---more docile, contemplative, emotionally expressive and studious while less confident and resolute. This is the part of him that studied in Munich for seven years.
This is his left side mirrored. Assuming he was right handed and right eyed, this side reflects his "ON" mood---more confident and resolute while less docile, contemplative, studious and emotionally expressive. In addition, eyes that are floating up like this (visible white showing under the iris) indicate that he was under long-term stress when this photo was taken. This side of him led the group, took command of an aircraft and flew it into a building.
When I saw the 19 photos of the hijackers,
I was able to pick out the "commanders" in each of the groups.

Bill Whiteside
http://www.ireadfaces.com
916-988-1182
billw@ireadfaces.com