1. 2. Turner J , Ranking Member, House Select Committee on Homeland Security. Transforming the Southern Border: Providing Security & Prosperity in the Post 9/11 World, 2004.
2. 3. U.S. Government Accountability Office. First phase of Visitor and Immigration Status Program operating, but improvements needed, Report GAO-04-586, Washington, DC, 2004.
3. The last line of defense: Designing radiation detection-interdiction systems to protect cities from a nuclear terrorist attack;Wein;IEEE Transactions on Nuclear Science,2007