1. Alexander, K., 2003. Add jet stress to the mental itinerary. Washington Post, September 30: E1-3.
2. Executive Office of the President, 2004. Budget of the US Government: Fiscal Year 2004. http://www.gpoaccess.gov/usbudget/fy04/browse.html, Retrieved on April 24.
3. Gore, A. Vice President, Chair. 1997. White House Commission on Aviation Safety and Security Final Report. http://www.fas.org/irp/threat/212fin∼1.html, retrieved on April 24, 2004.
4. Goo, S., 2003. TSA says hijackings are bigger threat than missiles. Washington Post, October 17, pp. A12–13.
5. Leone, K., 2001. Evaluation of commercially-available simulation software for airport security modeling. Federal Aviation Administration, Report No. DOT/FAA/AR-01/89, Washington, DC.