9-11 is a collection of interviews with Noam Chomsky first published in November 2001 in the aftermath of the terrorist attacks on the World Trade Center.

[2] In the original edition of 9-11 of November 2001, Chomsky places the September 11 attacks in the context of past American intervention in the Middle East, Latin America, Indonesia, Afghanistan, India, and Pakistan.

Interviewers include Italian periodical Il Manifesto; Kevin Canfield of the Hartford Courant; David Barsamian; Radio B92 of Belgrade; Elise Fried; Peter Kreysler; Paola Leoni of Giornale del Popolo (Switzerland); Marili Margomenou of Alpha TV (Greece); Miguel Mora of El País (Spain); Natalie Levisalles of Libération (France); and Michael Albert.

[5] An article about it in The New Yorker stated, "9-11 was practically the only counter-narrative out there at a time when questions tended to be drowned out by a chorus, led by the entire United States Congress, of 'God Bless America.'

"[6] The extended edition of the book, published in September 2011, includes a new essay by Chomsky which examines the impact and consequences of US foreign policy up to the killing of Osama bin Laden in Abbottabad, Pakistan, and reflects on what may have resulted if the crimes against humanity committed on 9/11 had been "approached as a crime, with an international operation to apprehend the likely suspects.