Fox News Flash top headlines are here. Check out what's clicking on FoxNews.com. It's called a biometric gate check -- more commonly known as facial recognition technology. U.S. Customs and Border Protection (CBP) has used it to process more than 100 million travelers at airports in the U.S. But now a bipartisan pair of U.S. senators is asking how the data is being used and trying to determine if it's an invasion of privacy, similar to daily life in communist China.