Government Accountability Office
General Accounting Office
Security-related Reports

GAO Homeland Security Reports - Subcategories

September 11
Dept. of Homeland Security
Disaster Preparedness / Response
Combating Terrorism
Building Security
Nuclear/Chemical/Biological Terrorism
Aviation Security
Maritime Security
Critical Infrastructure Protection
Border Control
Coast Guard
Drug Control
Financial/Counterfeiting
Information Security
Information Technology
Flu Pandemic

Aviation Security

• Aviation Security: TSA Improved Covert Testing but Needs to Conduct More Risk-Informed Tests and Address Vulnerabilities, GAO-19-374, April 4, 2019
• Transportation Security Acquisition Reform Act: TSA Generally Addressed Requirements, but Could Improve Reporting on Security-Related Technology, GAO-19-96, January 17, 2019
• Aviation Security: TSA Uses a Variety of Methods to Secure U.S.-bound Air Cargo, but Could Do More to Assess Their Effectiveness, GAO-19-162, November 28, 2018
• Aviation Security: Basic Training Program for Transportation Security Officers Would Benefit from Performance Goals and Measures, GAO-18-552, July 26, 2018
• Aviation Security: Actions Needed to Better Identify and Track U.S.-Bound Public Charter Operations from Cuba, GAO-18-526, July 12, 2018
• Small Unmanned Aircraft Systems: FAA Should Improve Its Management of Safety Risks, GAO-18-110, May 24, 2018
• Aviation Security: TSA Uses Data to Monitor Airport Operations and Respond to Increases in Passenger Wait Times and Throughput, Statement of W William Russell Iv, Acting Director, Homeland Security and Justice, GAO-18-563T, May 17, 2018
• Aviation Security: TSA Uses Current Assumptions and Airport-Specific Data for Its Staffing Process and Monitors Passenger Wait Times Using Daily Operations Data, GAO-18-236, February 1, 2018
• Transportation Security Administration: After Oversight Lapses, Compliance with Policy Governing Special Authority Has Been Strengthened, GAO-18-172, December 21, 2017
• Transportation Security Administration: Surface Transportation Inspector Activities Should Align More Closely With Identified Risks, GAO-18-180, December 14, 2017
• Aviation Security: TSA Strengthened Foreign Airport Assessments and Air Carrier Inspections, but Could Improve Analysis to Better Address Deficiencies, GAO-18-178, December 4, 2017
• TSA Modernization: Use of Sound Program Management and Oversight Practices Is Needed to Avoid Repeating Past Problems, GAO-18-46, October 17, 2017
• Aviation Security: TSA's Efforts to Assess Foreign Airports and Inspect Air Carriers, GAO-17-808T, September 26, 2017
• Aviation Security: Actions Needed to Systematically Evaluate Cost and Effectiveness Across Security Countermeasures, GAO-17-794, September 11, 2017
• Aviation Security: TSA Has Made Progress Implementing Requirements in the Aviation Security Act of 2016, GAO-17-662, September 7, 2017
• Aviation Security: TSA Does Not Have Valid Evidence Supporting Most of the Revised Behavioral Indicators Used in Its Behavior Detection Activities, GAO-17-608R, July 20, 2017
• Federal Air Marshal Service: Additional Actions Needed to Ensure Air Marshals' Mission Readiness, GAO-16-764, September 14, 2016
• Aviation Security: TSA Should Ensure Testing Data Are Complete and Fully Used to Improve Screener Training and Operations, GAO-16-704, September 7, 2016
• Aviation Security: TSA Is Taking Steps to Improve Expedited Screening Effectiveness, but Improvements in Screener Oversight Are Needed, GAO-16-707T, June 7, 2016
• Federal Air Marshal Service: Actions Needed to Better Incorporate Risk in Deployment Strategy, GAO-16-582, May 31, 2016
• Aviation Security: Airport Perimeter and Access Control Security Would Benefit from Risk Assessment and Strategy Updates, GAO-16-632, May 31, 2016
• Explosives Detection Canines: TSA Has Enhanced Its Canine Program, but Opportunities May Exist to Reduce Costs, GAO-16-444T, March 3, 2016
• Transportation Security: TSA Has Taken Actions to Address Transportation Security Acquisition Reform Act Requirements, GAO-16-285, February 17, 2016
• Transportation Security: Status of GAO Recommendations on TSA's Security-Related Technology Acquisitions, GAO-16-176, February 17, 2016
• TSA Acquisitions: Opportunities Exist to Enhance Efficiency of Screening Technology Test and Evaluation, by Michele Mackin, director, acquisition and sourcing management, before the Subcommittee on Transportation Security, House Committee on Homeland Security, GAO-16-322T, January 7, 2016
• TSA Acquisitions: Further Actions Needed to Improve Efficiency of Screening Technology Test and Evaluation, GAO-16-117, December 17, 2015
• Screening Partnership Program: Improved Cost Estimates Can Enhance Program Decision Making, by Jennifer Grover, director, homeland security and justice, before the Subcommittee on Transportation Security, House Committee on Homeland Security, GAO-16-115T, November 17, 2015
• Screening Partnership Program: TSA Can Benefit from Improved Cost Estimates, GAO-16-19, November 16, 2015
• Aviation Security: Improved Testing, Evaluation, and Performance Measurement Could Enhance Effectiveness, by Jennifer Grover, director, homeland security and justice, before the House Committee on Oversight and Government Reform, GAO-16-199T, November 3, 2015
• Aviation Security: TSA Has Taken Steps to Improve Vetting of Airport Workers, by Jennifer Grover, director, homeland security and justice, before the Subcommittee on Transportation Security, House Committee on Homeland Security, GAO-15-704T, June 16, 2015
• Aviation Security: TSA Has Taken Steps to Improve Oversight of Key Programs, but Additional Actions Are Needed, by Jennifer Grover, director, homeland security and justice, before the Senate Committee on Homeland Security and Governmental Affairs, GAO-15-678T, June 9, 2015
• Aviation Security: TSA Has Taken Steps to Improve Oversight of Key Programs, but Additional Actions Are Needed, by Jennifer Grover, director, homeland security and justice, before the House Committee on Oversight and Government Reform, GAO-15-559T, May 13, 2015
• Aviation Security: TSA's Managed Inclusion Process Expands Passenger Expedited Screening, But TSA Has Not Tested Its Security Effectiveness, by Jennifer A. Grover, director, homeland security and justice, before the Subcommittee on Transportation Security, House Committee on Homeland Security, GAO-15-465T, March 25, 2015
• Aviation Security: TSA Should Take Additional Action to Obtain Stakeholder Input when Modifying the Prohibited Items List, GAO-15-261, February 4, 2015
• Aviation Security: Rapid Growth in Expedited Passenger Screening Highlights Need to Plan Effective Security Assessments, GAO-15-150, December 12, 2014
• Aviation Security: TSA Should Limit Future Funding for Behavior Detection Activities, by Stephen M. Lord, director, homeland security and justice, before the Subcommittee on Transportation Security, House Committee on Homeland Security, GAO-14-158T, November 14, 2013
• Aviation Security: TSA Should Limit Future Funding for Behavior Detection Activities, GAO-14-159, November 8, 2013
• Transportation Security: Action Needed to Strengthen TSA's Security Threat Assessment Process, GAO-13-629, July 19, 2013
• Transportation Security: TSA Could Strengthen Oversight of Allegations of Employee Misconduct, by Stephen M. Lord, director, homeland security and justice issues, before the Subcommittees on Oversight and Management Efficiency and Transportation Security, House Committee on Homeland Security, GAO-13-756T, July 31, 2013
• Transportation Security: TSA Could Strengthen Monitoring of Allegations of Employee Misconduct, GAO-13-624, July 30, 2013
• Transportation Worker Identification Credential: Card Reader Pilot Results Are Unreliable; Security Benefits Should Be Reassessed, by Stephen M. Lord, director, homeland security and justice, before the Subcommittee on Government Operations, House Committee on Oversight and Government Reform, GAO-13-610T, May 9, 2013
• Transportation Worker Identification Credential: Card Reader Pilot Results Are Unreliable; Security Benefits Need to be Reassessed, GAO-13-198, May 8, 2013
• Homeland Security: DHS and TSA Continue to Face Challenges Developing and Acquiring Screening Technologies, by Stephen M. Lord, director, forensic audits and investigative services, before the Subcommittee on Transportation Security, House Committee on Homeland Security, GAO-13-469T, May 8, 2013
• Homeland Defense: DOD's Aerospace Control Alert Basing Decision Was Informed by Various Analyses, GAO-13-230R, February 28, 2013
• TSA Explosives Detection Canine Program: Actions Needed to Analyze Data and Ensure Canine Teams Are Effectively Utilized, GAO-13-239, January 31, 2013
• Screening Partnership Program: TSA Should Issue More Guidance to Airports and Monitor Private versus Federal Screener Performance, GAO-13-208, December 6, 2012
• Air Passenger Screening: Transportation Security Administration Needs to Improve Complaint Processes, by Stephen M. Lord, director, homeland security and justice issues, before the Subcommittee on Aviation, House Committee on Transportation and Infrastructure. GAO-13-186T, November 29, 2012
• Aviation Security: 9/11 Anniversary Observations on TSA's Progress and Challenges in Strengthening Aviation Security, by Stephen M. Lord, director, homeland security and justice issues, before the Subcommittee on Transportation Security, House Committee on Homeland Security, GAO-12-1024T, September 11, 2012
• General Aviation Security: TSA's Process for Ensuring Foreign Flight Students Do Not Pose a Security Risk Has Weaknesses, by Stephen M. Lord, director, homeland security and justice issues, before the Subcommittee on Transportation Security, House Committee on Homeland Security, GAO-12-900T, July 18, 2012
• General Aviation Security: Weaknesses Exist in TSA's Process for Ensuring Foreign Flight Students Do Not Pose a Security Threat, GAO-12-875, July 18, 2012
• Aviation Security: Status of TSA's Acquisition of Technology for Screening Passenger Identification and Boarding Passes, by Stephen M. Lord, director, homeland security and justice issues, before the House Committee on Homeland Security, Subcommittee on Transportation Security, GAO-12-826T, June 19, 2012
• Aviation Security: Actions Needed to Address Challenges and Potential Vulnerabilities Related to Securing Inbound Air Cargo, GAO-12-632, May 10, 2012
• Homeland Security: DHS and TSA Face Challenges Overseeing Acquisition of Screening Technologies, GAO-12-644T, May 09, 2012
• Checked Baggage Screening: TSA Has Deployed Optimal Systems at the Majority of TSA-Regulated Airports, but Could Strengthen Cost Estimates, GAO-12-266, April 27, 2012
• Transportation Security Administration: Progress and Challenges Faced in Strengthening three Key Security Programs by Stephen M. Lord, director, homeland security and justice issues, before the House Committee on Oversight and Government Reform and the House Committee On Transportation And Infrastructure, GAO-12-541T, March 26, 2012
• Homeland Defense: Continued Actions Needed to Improve Management of Air Sovereignty Alert Operations, GAO-12-311, January 31, 2012
• Transportation Security Infrastructure Modernization May Enhance DHS Screening Capabilities, but It Is Too Early to Assess Results, GAO-12-192R, December 8, 2011
• Transportation Security: Actions Needed to Address Limitations in TSA's Transportation Worker Security Threat Assessments and Growing Workload, GAO-12-60, December 8, 2011
• Transportation Security Information Sharing: Stakeholders Generally Satisfied but TSA Could Improve Analysis, Awareness, and Accountability, GAO-12-44, November 21, 2011
• Aviation Security: TSA Has Taken Steps to Enhance Its Foreign Airport Assessments, but Opportunities Exist to Strengthen the Program GAO-12-163, October 21, 2011
• Aviation Security: TSA Has Made Progress, but Additional Efforts Are Needed to Improve Security, by Stephen M. Lord, director, homeland security and justice issues, before the Oversight, Investigations, And Management Subcommittee of the House Homeland Security Committee. GAO-11-938T, September 16, 2011
• Aviation Security: TSA Has Taken Actions to Improve Security, but Additional Efforts Remain, GAO-11-807T, Jul 13, 2011
• Aviation Security: TSA Has Enhanced Its Explosives Detection Requirements for Checked Baggage, but Additional Screening Actions Are Needed, GAO-11-740, Jul 11, 2011
• General Aviation: Security Assessments at Selected Airports, GAO-11-298, May 20, 2011
• Aviation Security: TSA Is Taking Steps to Validate the Science Underlying Its Passenger Behavior Detection Program, but Efforts May Not Be Comprehensive, GAO-11-461T, Apr 6, 2011
• Aviation Security: Progress Made, but Challenges Persist in Meeting the Screening Mandate for Air Cargo, GAO-11-413T, Mar 9, 2011
• Aviation Security: TSA's Revised Cost Comparison Provides a More Reasonable Basis for Comparing the Costs of Private-Sector and TSA Screeners, GAO-11-375R, Mar 4, 2011
• Aviation Security: DHS Has Taken Steps to Enhance International Aviation Security and Facilitate Compliance with International Standards, but Challenges Remain, GAO-11-238T, Dec 2, 2010
• Aviation Security: Progress Made but Actions Needed to Address Challenges in Meeting the Air Cargo Screening Mandate, GAO-10-880T, Jun 30, 2010
• Aviation Security: Efforts to Validate TSA's Passenger Screening Behavior Detection Program Underway, but Opportunities Exist to Strengthen Validation and Address Operational Challenges, GAO-10-763, May 20, 2010
• Transportation Security: Additional Actions Could Strengthen the Security of Intermodal Transportation Facilities, GAO-10-435R, May 27, 2010
• Surface Transportation Security: TSA Has Taken Actions to Manage Risk, Improve Coordination, and Measure Performance, but Additional Actions Would Enhance Its Efforts, GAO-10-650T, Apr 21, 2010
• GAO Review of the Department of Homeland Security's Certification of the Secure Flight Program--Cost and Schedule Estimates, GAO-10-535R, Apr 5, 2010
• Aviation Security: TSA Is Increasing Procurement and Deployment of the Advanced Imaging Technology, but Challenges to This Effort and Other Areas of Aviation Security Remain, GAO-10-484T, Mar 17, 2010
• Aviation Safety: Preliminary Information on Aircraft Icing and Winter Operations, GAO-10-441T, Feb 24, 2010
• Aviation Security: DHS and TSA Have Researched, Developed, and Begun Deploying Passenger Checkpoint Screening Technologies, but Continue to Face Challenges, GAO-10-128, Oct 7, 2009
• Transportation Security Administration: TSA Executive Attrition Has Declined, but Better Information Is Needed on Reasons for Leaving and Executive Hiring Process, GAO-10-139, Oct 9, 2009
• Aviation Security: A National Strategy and Other Actions Would Strengthen TSA's Efforts to Secure Commercial Airport Perimeters and Access Controls, GAO-09-399, Sep 30, 2009
• Federal Air Marshal Service: Actions Taken to Fulfill Core Mission and Address Workforce Issues, GAO-09-903T, Jul 23, 2009
• Aviation Security: TSA Has Completed Key Activities Associated with Implementing Secure Flight, but Additional Actions Are Needed to Mitigate Risks, GAO-09-292, May 13, 2009
• Homeland Defense: Actions Needed to Address Management of Air Sovereignty Alert Operations to Protect U.S. Airspace, GAO-09-612T, Apr 22, 2009
• Transportation Security: Comprehensive Risk Assessments and Stronger Internal Controls Needed to Help Inform TSA Resource Allocation, GAO-09-492, Mar 27, 2009
• Aviation Security: Preliminary Observations on TSA's Progress and Challenges in Meeting the Statutory Mandate for Screening Air Cargo on Passenger Aircraft, GAO-09-422T, Mar 18, 2009
• Aviation Safety: NASA's National Aviation Operations Monitoring Service Project Was Designed Appropriately, but Sampling and Other Issues Complicate Data Analysis, GAO-09-112, Mar 13, 2009
• Aviation Security: Federal Air Marshal Service Has Taken Actions to Fulfill Its Core Mission and Address Workforce Issues, but Additional Actions Are Needed to Improve Workforce Survey, GAO-09-273, Jan 14, 2009
• Aviation Security: TSA's Cost and Performance Study of Private-Sector Airport Screening, GAO-09-27R, Jan 9, 2009
• Aviation Security: Status of Transportation Security Inspector Workforce, GAO-09-123R, Feb 6, 2009
• Homeland Defense: Actions Needed to Improve Management of Air Sovereignty Alert Operations to Protect U.S. Airspace, GAO-09-184, Jan 27, 2009
• Transportation Security Administration's Suspension of the Butane Lighter Ban Onboard Commercial Aircraft, GAO-09-177R, Dec 5, 2008
• Aviation Security: TSA Is Enhancing Its Oversight of Air Carrier Efforts to Identify Passengers on the No Fly and Selectee Lists, but Expects Ultimate Solution to Be Implementation of Secure Flight, GAO-08-992, Sep 9, 2008
• Aviation Security: TSA Is Enhancing Its Oversight of Air Carrier Efforts to Screen Passengers against Terrorist Watch-List Records, but Expects Ultimate Solution to Be Implementation of Secure Flight, GAO-08-1136T, Sep 9, 2008
• Review of the Transportation Security Administration's Air Cargo Screening Exemptions Report, GAO-08-1055R, Aug 15, 2008
• Transportation Security: TSA Has Developed a Risk-Based Covert Testing Program, but Could Better Mitigate Aviation Security Vulnerabilities Identified Through Covert Tests, GAO-08-958, Aug 8, 2008
• TSA's Explosives Detection Canine Program: Status of Increasing Number of Explosives Detection Canine Teams, GAO-08-933R, Jul 31, 2008
• Aviation Security: Transportation Security Administration Has Strengthened Planning to Guide Investments in Key Aviation Security Programs, but More Work Remains, GAO-08-1024T, Jul 24, 2008
• Aviation Security: Transportation Security Administration May Face Resource and Other Challenges in Developing a System to Screen All Cargo Transported on Passenger Aircraft, GAO-08-959T, Jul 15, 2008
• Transportation Security: Transportation Security Administration Has Strengthened Planning to Guide Investments in Key Aviation and Surface Transportation Security Programs, but More Work Remains, GAO-08-487T, May 13, 2008
• Transportation Security: Efforts to Strengthen Aviation and Surface Transportation Security Continue to Progress, but More Work Remains, GAO-08-651T, Apr 15, 2008
• Aviation Security: Transportation Security Administration Has Strengthened Planning to Guide Investments in Key Aviation Security Programs, but More Work Remains GAO-08-456T February 28, 2008
• Transportation Security Administration's Processes for Designating and Releasing Sensitive Security Information GAO-08-232R November 30, 2007
• Aviation Security: Vulnerabilities Exposed Through Covert Testing of TSA's Passenger Screening Process GAO-08-48T November 15, 2007
• Transportation Security: TSA Has Made Progress in Implementing the Transportation Worker Identification Credential Program, but Challenges Remain GAO-08-133T October 31, 2007
• Aviation Security: DHS Has Made Progress in Securing the Commercial Aviation System, but Key Challenges Remain GAO-08-139T October 16, 2007
• Aviation Security: Federal Coordination for Responding to In-flight Security Threats Has Matured, but Procedures Can Be Strengthened GAO-07-891R July 31, 2007
• Aviation Security: Foreign Airport Assessments and Air Carrier Inspections Help Enhance Security, but Oversight of These Efforts Can Be Strengthened GAO-07-729, May 11, 2007 [PDF 2.02MB]
• Aviation Security: TSA's Change to Its Prohibited Items List Has Not Resulted in Any Reported Security Incidents, but the Impact of the Change on Screening Operations Is Inconclusive GAO-07-623R, April 25, 2007
• Aviation Security: Risk, Experience, and Customer Concerns Drive Changes to Airline Passenger Screening Procedures, but Evaluation and Documentation of Proposed Changes Could Be Improved GAO-07-634, April 16, 2007 [PDF 1.61MB]
• Aviation Security: Cost Estimates Related to TSA Funding of Checked Baggage Screening Systems at Los Angeles and Ontario Airports GAO-07-445, March 30, 2007
• Aviation Security: TSA's Staffing Allocation Model Is Useful for Allocating Staff among Airports, but Its Assumptions Should Be Systematically Reassessed GAO-07-299, February 28, 2007 [PDF 2.59MB]
• Aviation Security: Progress Made in Systematic Planning to Guide Key Investment Decisions, but More Work Remains GAO-07-448T, February 13, 2007
• Transportation Security Administration's Office of Intelligence: Responses to Posthearing Questions Regarding Secure Flight GAO-06-1051R, August 4, 2006
• Aviation Security: TSA Oversight of Checked Baggage Screening Procedures Could Be Strengthened GAO-06-869, July 28, 2006
• Aviation Security: Management Challenges Remain for the Transportation Security Administration's Secure Flight Program GAO-06-864T, June 14, 2006
• Aviation Security: Further Study of Safety and Effectiveness and Better Management Controls Needed If Air Carriers Resume Interest in Deploying Less-than-Lethal Weapons GAO-06-475, May 26, 2006
• Aviation Security: Flight and Cabin Crew Member Security Training Strengthened but Better Planning and Internal Controls Needed. GAO-05-781, September 6, 2005.
• Aviation Security: Transportation Security Administration Did Not Fully Disclose Uses of Personal Information During Secure Flight Program Testing in Initial Privacy Notices, but Has Recently Taken Steps to More Fully Inform the Public. GAO-05-864R, July 22, 2005. [PDF 3.7MB]
• Homeland Defense: Agency Resources Address Violations of Restricted Airspace but Management Improvements Are Needed, by Davi D'Agostino, director, defense capabilities and management, before the House Committee on Government Reform. GAO-05-928T, July 21, 2005.
• International Air Passengers: Staffing Model for Airport Inspections Personnel Can Be Improved. GAO-05-663, July 15, 2005.
• Aviation Security: Better Planning Needed to Optimize Deployment of Checked Baggage Screening Systems, by Cathleen A. Berrick, director, homeland security and justice, before the Subcommittee on Economic Security, Infrastructure Protection, and Cybersecurity, House Committee on Homeland Security. GAO-05-896T, July 13, 2005.
• Transportation Security Administration: Clear Policies and Oversight Needed for Designation of Sensitive Security Information. GAO-05-677, June 29, 2005.
• Nonproliferation: Improvements Needed in Countering Threat for Man-Portable Air Defense Systems. GAO-04-519, May 13, 2005. [PDF 4.2MB]
• Aviation Security: Screener Training and Performance Measurement Strengthened, but More Work Remains. GAO-05-457, May 2, 2005. [PDF 1.5MB]
• Aviation Security: Secure Flight Development and Testing Under Way, but Risks Should Be Managed as System Is Further Developed. GAO-05-356, March 28, 2005.
• Aviation Security: Systematic Planning Needed to Optimize the Deployment of Checked Baggage Screening Systems. GAO-05-365, March 15, 2005. [PDF 3.5MB]
• Aviation Security: Measures for Testing the Impact of Using Commercial Data for the Secure Flight Program. GAO-05-324, February 23, 2005.
• Transportation Security: Systematic Planning Needed to Optimize Resources, by Cathleen A. Berrick, director, homeland security and justice, before the Senate Committee on Commerce, Science, and Transportation. GAO-05-357T, February 15, 2005.
• General Aviation Security: Increased Federal Oversight Is Needed, but Continued Partnership with Private Sector Is Critical to Long-Term Success. GAO-05-144, November 10, 2004. [PDF 6.5MB]
• Aviation Safety: FAA Needs to Strengthen the Management of Its Designee Program. GAO-05-40, October 8, 2004.
• Transportation Security Administration: High-Level Attention Needed to Strengthen Acquisition Function. GAO-04-544, May 28, 2004.
• Aviation Security: Further Steps Needed to Strengthen the Security of Commercial Airport Perimeters and Access Controls. GAO-04-728, June 4, 2004.
• Budget Issues: Reprogramming of Federal Air Marshal Service Funds in Fiscal Year 2003 (GAO-04-577R), March 31, 2004 [PDF 445 Kb]
• Aviation Security: Improvement Still Needed in Federal Aviation Security Efforts, by Norman J. Rabkin, managing director, homeland security and justice, before the Subcommittee on Aviation, Senate Committee on Commerce, Science, and Transportation. (GAO-04-592T), March 30, 2004 [PDF 368 KB]
• Aviation Security: Challenges Delay Implementation of Computer-Assisted Passenger Pre-Screening System, by Norman J. Rabkin, managing director, homeland security and justice, before the Subcommittee on Aviation, House Committee on Transportation and Infrastructure. (GAO-04-504T), March 17, 2004 [PDF 224 KB]
• Aviation Security: Factors Could Limit the Effectiveness of the Transportation Security Administration's Efforts to Secure Aerial Advertising Operations. (GAO-04-499R), March 5, 2004 [PDF 243 KB]
• Airport Security: Challenges to Airport Passenger and Baggage Screening, by Cathleen A. Berrick, director, homeland security and justice, before the Subcommittee on Aviation, House Committee on Transportation and Infrastructure. (GAO-04-440T), February 12, 2004 [PDF 341 KB]
• Aviation Security: Computer-Assisted Passenger Prescreening System Faces Significant Implementation Challenges. (GAO-04-385), February 12, 2004 [PDF 623 KB]
• Posthearing Questions Related to Aviation and Port Security (GAO-04-315R) December 12, 2003 [PDF 90 Kb]
• Aviation Security: Efforts to Measure Effectiveness and Strengthen Security Programs, by Cathleen A. Berrick, director, homeland security and justice, before the House Committee on Government Reform, 9GAO-04-285T), November 20, 2003 [PDF 261 Kb]
Aviation Security: Federal Air Marshal Service Is Addressing Challenges of Its Expanded Mission and Workforce, but Additional Actions Needed, (GAO-04-242), November 19, 2003 [PDF 968 Kb]
• Aviation Security: Efforts to Measure Effectiveness and Address Challenges, by Cathleen A. Berrick, director, homeland security and justice, before the Senate Committee on Commerce, Science, and Transportation, (GAO-04-232T), November 5, 2003 [PDF 705 Kb]
• Airport Passenger Screening: Preliminary Observations on Progress Made and Challenges Remaining, (GAO-03-1173), September 24, 2003 [PDF 344 Kb]
• Aviation Security: Progress Since September 11th and the Challenges Ahead, by Gerald L. Dillingham, director, physical infrastructure, before the Senate Committee on Commerce, Science, and Transportation, (GAO-03-1150T), September 9, 2003 [PDF 2.26 Mb]
• Aviation Security: Vulnerabilities and Potential Improvements for the Air Cargo Security System, December 20 2002 (GAO-03-344) [PDF 925 Kb]
• AVIATION SECURITY: Registered Traveler Program Policy and Implementation Issues, November 2002 (GAO-03-253) [PDF 361 Kb]
• AVIATION SECURITY: Transportation Security Administration Faces Immediate and Long-Term Challenges -- Statement of Gerald L. Dillingham, Director, Physical Infrastructure Issues, July 25, 2002, (GAO-02-971T) [PDF 208 KB]
• Information Concerning the Arming of Commercial Pilots, June 28, 2002, (GAO-02-822R) [PDF 107 Kb]
• Aviation Safety: Undeclared Air Shipments of Dangerous Goods and DOT's Enforcement Approach, January 10 2002 (GAO-03-22) [PDF 1.3 Mb]
• AVIATION SECURITY Vulnerabilities in, and Alternatives for, Preboard Screening Security Operations -- Statement of Gerald L. Dillingham Director, Physical Infrastructure Issues, September 25, 2001 (GAO-01-1171T) [PDF 105 Kb]
• AVIATION SECURITY: Weaknesses in Airport Security and Options for Assigning Screening Responsibilities -- Statement of Gerald L. Dillingham Director, Physical Infrastructure Issues, September 21, 2001 (GAO-01-1165T) [PDF 107 Kb]
• AVIATION SECURITY: Terrorist Acts Illustrate Severe Weaknesses in Aviation Security -- Statement of Gerald L. Dillingham Director, Physical Infrastructure Issues, September 20, 2001 (GAO-01-1166T) [PDF 103 Kb]
• AVIATION SECURITY: Terrorist Acts Demonstrate Urgent Need to Improve Security at the Nation's Airports -- Statement of Gerald L. Dillingham, Director, Physical Infrastructure Issues, September 20, 2001 (GAO-01-1162T) [PDF 103 Kb]
• COMMERCIAL AVIATION: A Framework for Considering Federal Financial Assistance -- Statement of David M. Walker, Comptroller General of the United States, September 20, 2001 (GAO-01-1163T) [PDF 82 Kb]
• Aviation Security: Vulnerabilities Still Exist in the Aviation Security System [T-RCED/AIMD-00-142] 04/06/2000
• Aviation Security: FAA's Actions To Study Responsibilities and Funding for Airport Security and To Certify Screening Companies (Letter Report, 02/25/99, GAO/RCED-99-53).
• Aviation Security: Technology's Role in Addressing Vulnerabilities(Testimony, 09/19/96, GAO/T-RCED/NSIAD-96-262)
• Aviation Security: Urgent Issues Need to Be Addressed (Testimony, 09/11/96, GAO/T-RCED/NSIAD-96-251)
• Aviation Security: Immediate Action Needed to Improve Security(Testimony, 08/01/96, GAO/T-RCED/NSIAD-96-237)
• Aviation Security: Development of New Security Technology Has Not Met Expectations (Chapter Report, 05/19/94, GAO/RCED-94-142). [PDF Version 5.07 Mb]