The play is adapted from the non-fictional work "the Tower of Doom-al-Qaeda and the Road to 9 / 11". On September 11, 2001, the United States suffered the worst terrorist attack in history. Four Boeing airliners were hijacked, hitting the Twin Towers of the World Trade Center and the Pentagon of the Ministry of Defense, resulting in more than 3000 deaths and hundreds of billions of dollars in economic losses. New Yorker reporter Lawrence Wright has embarked on a long road of reporting, a five-year, more than 500-page in-depth report. About the relationship between CIA, FBI and al-Qaeda.