International Aviation Security: TSA Should Improve Industry Coordination and Its Security Directive and Emergency Amendment Review Process, Report to Congressional Committees [open pdf - 2MB]
From the GAO Highlights [Government Accountability Office]: "Approximately 300 airports in foreign countries offer last point of departure flights to the United States. When threat information or vulnerabilities at foreign airports indicate an immediate need for air carriers to implement additional security measures, TSA [Transportation Security Administration] may issue new or revise existing security directives (for domestic air carriers) and emergency amendments (for foreign air carriers). The TSA Modernization Act includes a provision for GAO to examine TSA's review process for directives that apply at last point of departure airports. This report (1) identifies key characteristics of the TSA directives and (2) assesses TSA's process to review directives. GAO reviewed TSA policies and procedures, analyzed TSA program information, and interviewed TSA officials and representatives from a nongeneralizable sample of 10 air carriers, selected to represent carriers with high numbers of U.S.-bound flights, and three industry associations."
Government Accountability Office: http://www.gao.gov/