(CNN)Here's a look at the 9/11 Commission, whose report was released on July 22, 2004.
The Commission was created to provide a "complete account of the circumstances surrounding the September 11, 2001 terrorist attacks."
The official name of the 9/11 Commission is the National Commission on Terrorist Attacks Upon the United States.
The 570-page, 14-chapter report concluded that a "failure of imagination" kept US officials from understanding the al Qaeda threat before the attacks on New York and Washington.
The report included 41 recommendations for reforming US security agencies to fight terrorism.
The report called for a single national intelligence chief and a single counterterrorism center modeled on the military's unified commands. It also proposed the creation of a single, joint congressional committee to oversee homeland security.
The purpose of the commission was to investigate US counterterrorism policy from August 1998 to September 11, 2001.
Budget for the Commission totaled $15 million.
It originally had 18 months to report, or no later than May 27, 2004, but Congress and the President extended the reporting deadline by two months, to July 26, 2004.
The Commission had nearly 80 full-time employees, contractors and employees on staff.
President George W. Bush and Vice President Dick Cheney agreed to meet with commission chair and vice chair only.
The Commission said it had access to all documents and interviews it requested.
"We've gotten everything we've asked for, but always after a lot of resistance and criticism," said member Slade Gorton.
It issued three subpoenas for information, but these were resolved without litigation. The subpoenas went to the Federal Aviation Administration (FAA), the Department of Defense and the City of New York.
The Commission reviewed more than two million pages of documents.
The Commission's 10 Members
Thomas H. Kean, Chair - former governor of New Jersey (1982-1990)
Lee H. Hamilton, Vice Chair - former Congressman
Richard Ben-Veniste - Attorney and former chief of the Watergate Task Force, Special Prosecutor's Office
Fred F. Fielding - Has served on several commissions, including Commission on Federal Ethics Law Reform (1989)
Jamie S. Gorelick - Served on the CIA's National Security Advisory Panel
Slade Gorton - Senator from Washington State from 1981-1987 and 1989-2001
Bob Kerrey - Senator for Nebraska from 1988-2000 and Nebraska Governor from 1983-1987
John F. Lehman - Chairman of J.F. Lehman & Company, a private equity investment firm and former Secretary of the Navy from 1981-1987
Timothy J. Roemer - President of the Center for National Policy and Representative to Congress from Indiana 1991-2003
James R. Thompson - Illinois' longest serving governor, from 1977-1991
The Commission's Eight Topics
Intelligence Collection, Analysis, and Management (including oversight and resource allocation)
International Counterterrorism Policy, including states that harbor or harbored terrorists, or offer terrorists safe havens
Border Security and Foreign Visitors
Law Enforcement and Intelligence Collection inside the United States
Commercial Aviation and Transportation Security, including an Investigation into the Circumstances of the Four Hijackings
The Immediate Response to the Attacks at the National, State, and local levels, including issues of Continuity of Government
November 27, 2002 - Bush signs a bill creating the Commission. Bush also appoints Former Secretary of State Henry Kissinger to chair the commission.
December 11, 2002 - Former Senator George Mitchell, originally chosen by Democrats to be vice chairman, resigns, saying the workload would be too much and citing potential conflicts of interest with his law firm.
December 13, 2002 - Kissinger resigns over potential conflicts of interest involving clients of his consulting firm and public outcry over his appointment.
December 16, 2002 - Bush appoints Kean to chair the Commission.
March 31 - April 1, 2003 - The first of 12 public hearings take place. The focus is hearing from victims and people impacted by 9/11.
July 8, 2003 - The first interim report is released.
September 23, 2003 - The second interim report is released.
March 24, 2004 - Former Counterterrorism Chief Richard A. Clarke testifies at the eighth public hearing. Clark testifies that the Bush administration did not see terrorism as an "urgent issue" prior to September 11.
March 30, 2004 - The White House says it will allow National Security Adviser Condoleezza Rice to testify publicly before the commission investigating the September 11 terrorist attacks, so long as her appearance is not considered a precedent.