The Department of Homeland Security (DHS) Visa Security Program is intended to prevent terrorists, criminals, and other ineligible applicants from receiving visas. DHS assigns special agents with expertise in immigration law and counterterrorism to U.S. diplomatic posts overseas to perform visa security activities . We reviewed the program’s effectiveness in preventing ineligible applicants from receiving U.S. visas; DHS’ annual reporting to Congress on the program’s expansion; and the efforts to expand the program to additional overseas posts, including the potential impact of a new initiative, the Pre ‐ Adjudicated Threat Recognition and Intelligence OperationsTeam.