Developing a biometric entry-exit system to track foreign visitors to the U.S. and ensure they don’t overstay their welcome was a key recommendation of the final report of the 9/11 Commission after it was determined that five of the nine hijackers had overstayed their visas. Nearly 13 years and several missed deadlines later, the goal of achieving that fully integrated system remains elusive for the Department of Homeland Security, according to a new report by the Government Accountability Office. […]