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Author/Creator
- ebrary, Inc35
- Project Muse19
- National Commission on Terrorist Attacks upon the United States18
- Hamilton, Lee10
- Kean, Thomas H.10
- ProQuest (Firm)8
- Brookings Institution7
- Kraft, Michael, 1937-7
- O'Hanlon, Michael E.7
- Mueller, John E.6
- Stewart, Mark G., 1961-6
- United States. Department of Homeland Security6
- Weiss, Linda (Linda M.)6
- Alexander, Yonah5
- Council on Foreign Relations5
- Goldwyn, David L., 1959-5
- Kalicki, Jan H.5
- Rand Corporation5
- Spellman, Frank R.5
- United States. General Accounting Office5