Character mistake: At the meeting in Washington the general says nothing more frightening than a soldier with his M16A1, but they were using M16A2s.
Factual error: In the movie, the FBI's staging area/headquarters for the terrorist cell investigation is at 1 Federal Plaza in New York City. In reality 1 Federal Plaza is the address of the US Court of International Trade. 26 Federal Plaza is the address of the FBI's New York office.
Continuity mistake: When Elise/Sharon is shot, the blood stains on her blouse vary in size and location several times between shots. (01:41:20)
Factual error: In the scene after the bombing of the FBI Building there are a couple of firefighters with NYFD on the back of their coats. The New York City Fire Department uses official initials of FDNY for Fire Department New York, not NYFD.
