1.   But if airports set up an international database of iris patterns, they would make it extremely difficult for terrorists to adopt multiple identities.

2.   In addition to thumb or handprint scanning, exhibitors are showing off technologies such as facial recognition computer programs and mini-cams that analyze and recognize iris patterns.

3.   Passing near a camera, the travelers will have their identities instantly confirmed from their iris patterns, allowing them speedy entry that bypasses customs and immigration bottlenecks.

4.   Sniper flies would seek out field commanders, recognizing them by the iris patterns of their eyes.

5.   The system relies on the fact that every person has a distinct iris pattern, as unique as a fingerprint.

6.   The system relies on the fact that every person has a unique iris pattern.