Originally Posted by wikipedia

The U.S. version of the biometric passport (sometimes referred to as an electronic passport) has descriptive data and a digitized passport photo on its contactless chips, and does not have fingerprint information placed onto the contactless chip. However, the chip is large enough (64 kilobytes) for inclusion of biometric identifiers. The U.S. Department of State now issues biometric passports only. Passports without chips remain valid for the entirety of their respective periods of validity.[8]

Although a system able to perform a facial-recognition match between the bearer and his or her image stored on the contactless chip is desired, it is unclear when such a system will be deployed by the U.S. Department of Homeland Security at its ports of entry.