“Chastened by their failure to predict the [9/11] attacks, United States officials have begun the task of sifting through previous intelligence reports to determine whether they missed any indications that an assault was imminent. Officials said that in hindsight, some strands of intelligence now appeared far more significant than they did at the time they were collected.”
– James Risen and Don Van Natta Jr., “Authorities Have Learned the Identities of 18 Hijackers, Attorney General Says,” The New York Times, Sep. 14, 2001