Read about why Iris scans should be part of U.S. passport technology: Iris scans let law enforcement keep eye on technology. From USA Today:

"More than 2,100 departments in 27 states are taking digital pictures of eyes and storing the information in databases that can be searched later to identify a missing person or someone who uses a fake name, says Sean Mullin, president of BI{+2} Technologies, which sells the devices."

Passport fraud is going unseen, State Department Officials warn — with Europe's burgeoning counterfeit passport business making it easier to get a fake passport and enter the United States.

In December 2006, BBC reporter Shahida Tulaganova bought 20 fake and stolen passports with which she was able to enter, and re-enter England. In an expose called "Me and My Passports," Tulaganova revealed how she purchased all 20 fraudulent passports in Europe:

"They ranged in price from just $250 to more than $1,500. Some were provided within several days, while others took weeks.

She found her first illegal passport dealer in the centre of London - through an advertisement in a Russian language newspaper.

The dealer - Henry - provided her with a genuine Czech passport, by getting someone who looked like her to apply for one, using her photo."

An Iris scan would have stopped Tulaganova at England's gates.

In July 2007, British police seized 1,800 fake passports in a two bedroom flat in North London. For further reading: How Terrorists Use Fake Passports, Visas, and Other Identify Documents. (Orianna Zill, PBS Frontline.