Kansas Senator Roger Marshall is among a bipartisan group of Capitol Hill lawmakers who are voicing concerns about a new technology that is being used by the Transportation Security Administration at airports across the country.

The TSA is planning to introduce next-generation credential authentication technology (CAT) equipped with facial recognition at over 430 airports nationwide.  The technology is being used at Eisenhower National Airport in Wichita, although travelers can opt out of it.  

Marshall and Democratic Senator Jeff Merkley of Oregon have joined Senators John Kennedy of Louisiana, Edward J. Markey of Massachusetts, and Ted Cruz of Texas in a letter urging a thorough investigation by U.S. Department of Homeland Security Inspector General Joseph Cuffari into the TSA’s collection of facial biometric data. Their letter comes as a record-breaking number of Americans are expected to travel this holiday season, meaning more Americans than ever before may have their faces scanned at the airport.

The Senators said the agency already deploys non-facial recognition devices, known as CAT-1 scanners, which are capable of determining if identification documents are fraudulent.  They said “TSA has not provided Congress with evidence that facial recognition technology is necessary to catch fraudulent documents, decrease wait times at security checkpoints, or stop terrorists from boarding airplanes.”