The Commission held 12 public hearings during the course of its investigation, convening for a total of 19 days and receiving testimony from 160 witnesses. The following is a list of hearings and witnesses in order of their appearance. All witnesses appearing during the 2004 calendar year testified under oath.

FIRST PUBLIC HEARING

The Honorable George Pataki, Governor, State of New York
The Honorable Michael R. Bloomberg, Mayor, City of New York

The Experience of the Attack
Harry Waizer, survivor, Cantor Fitzgerald, LP
David Lim, Police Department, Port Authority of New York and New Jersey
Lee Ielpi, Fire Department of New York (retired)
Lieutenant Colonel Brian Birdwell, United States Army
Craig Sincock, United States Army (retired)

Representatives of the Victims
Stephen Push, Families of September 11
Mary Fetchet,Voices of September 11
Mindy Kleinberg, September 11 Advocates
Allison Vadhan, Families of Flight 93

The Attackers, Intelligence, and Counterterrorism Policy
Daniel Byman, Georgetown University
Abraham D. Sofaer, Hoover Institution
Brian Jenkins, RAND Corporation
Magnus Ranstorp, University of St.Andrews

Borders, Money, and Transportation Security
Glenn Fine, Inspector General, U.S. Department of Justice
Lee Wolosky, Boies, Schiller & Flexner LLP
Gerald Dillingham, Director, Civil Aviation Issues, General Accounting Office

Law Enforcement, Domestic Intelligence, and Homeland Security
Michael Wermuth, RAND Corporation
Steven Brill,Author, After: How America Confronted the September 12 Era
Zoë Baird, Markle Foundation
Randy Larsen,ANSER Institute for Homeland Security

Immediate Response to the Attacks
Shawn Kelley,Assistant Chief,Arlington County Fire Department
William Baker,American Society of Civil Engineers
Ken Holden, Commissioner, New York City Department of Design and Construction