The Transportation Security Administration (TSA) will conduct a short-term proof of concept at the McCarran International Airport (LAS) for automating the identity verification portion of the Travel Document Checker (TDC) using biometric technology.TSA will assess its ability to compare the passenger's live facial image at the checkpoint against an image taken from the passenger's identity document for passengers who opt to participate.This information will be used for subsequent qualitative and quantitative analysis by the Department of Homeland Security Science and Technology (S&T) Directorate. This Privacy Impact Assessment (PIA) follows TSA's previously published PIA, which covered a proof of concept at the Los Angeles International Airport (LAX) for automating the identity verification portion of the TDC using facial recognition technology to capture a passenger's facial image to compare against the biometric image contained on the passenger's e-Passport.This PIA is conducted pursuant to Section 222 of the Homeland Security Act to address the privacy risks inherent in the use of facial recognition technology during this pilot.