1. Airport Security Improvement Act of 2000. Public Law 106–528, 114 Stat. 2517–2523
2. Aviation and Transportation Security Act. November 19, 2001. “(Public law 107–71, 107th Congress)”.
3. Aviation security: Additional actions needed to meet domestic and international challenges. January, 1994. Washington, D.C.: United States General Accounting Office.
4. Aviation security: Better planning needed to optimize deployment of checked baggage screening systems. July 13, 2005. Washington, D.C.: United States Government Accountability Office.