To modernize airport checkpoints, enhance security effectiveness and efficiency and improve the passenger experience, TSA is deploying new technology solutions nationwide. Credential authentication technology (CAT) units confirm the authenticity of a passenger's identification credentials, along with their flight details and pre-screening status without a boarding pass. With CAT, passengers only need to provide their acceptable photo identification to the officer. Travelers who do not wish to participate in the facial matching process may opt out in favor of an alternative identity verification process without losing their place in line. 

TSA is also deploying computed tomography (CT) units to checkpoints nationwide. CT units give TSA officers the ability to review a 3D image of passengers' bags and reduce the need to physically search the contents of the bag. Passengers screened in security lanes with CT units do not need to remove their 3-1-1 liquids or laptops, but they must place every carry-on item, including bags, into a bin for screening.