As Americans pack their bags for holiday travel, a new report is raising key questions about a pilot program that scans the faces of international travelers. The report, from Georgetown Law’s Center on Privacy and Technology, criticizes the scope and execution of Homeland Security’s biometric exit pilot program. The program, currently running at nine airports around the country, uses facial recognition technology to identify passengers leaving on international flights. Homeland Security says the program, which it plans to expand, can catch travelers fraudulently using another person’s personal documents. But the report questions whether Homeland Security is vested with the power...