This airport is already using facial recognition on U.S. citizens

Customs and Border Protection (CBP) evidently doesn't need Congress to begin using facial recognition of United States citizens. 

Officials at George Bush Intercontinental Airport in Houston and Logan International Airport in Boston earlier this week began to scan faces of U.S. citizens and other passengers on specific flights. Congress has nine times passed legislation authorizing the use of biometric technology on non-U.S. citizens as a way of verifying when foreign nationals enter and exit the country, but they've never authorized such legislation for citizens, according to surveillance law experts. Read more...