Richard Alan Clarke is an American national security expert, novelist, and former government official. He served as the Counterterrorism Czar for the National Coordinator for Security, Infrastructure Protection, and Counter-Terrorism for the United States between 1998 and 2003.

The National Commission on Terrorist Attacks Upon the United States, commonly known as the 9/11 Commission, was set up on November 27, 2002, to investigate all aspects of the September 11 attacks, the deadliest terrorist attack in world history. It was created by Congressional legislation, which charged it with preparing "a full and complete account of the circumstances surrounding the September 11 attacks", including preparedness by the U.S. federal government for the attacks, the response following the attacks, and steps that can be taken to guard against a future terrorist attack.